Adaptive Planning Express – An open source solution enabling medium sized companies to automate budgeting and forecasting by moving beyond traditional applications like Excel.
Buddi – A simple budgeting program for users with no financial background.
CheckItOut – A Ruby on Rails application to manage personal money accounts.
FrontAccounting – A professional web-based accounting system for ERP chain; written in PHP with use of MySQL.
GFP – A free java based personal finance manager with the ability to run on any operating system.
GnuCash – Open source financial accounting software to manage personal and small business expenses and incomes.
Gnumeric – A free spreadsheet program for the GNOME desktop providing several customization features and import/export facility from other spreadsheet programs.
Grisbi – Grisbi is an open source personal finance manager developed to run on any platform and suit the needs of all users.
jGnash – jGnash is an open source personal finance manager that will help you monitor and keep track of your accounts, including investments.
KmyMoney – Easy to use, accurate open source personal finance manager built to suit the needs of non-technical users. It provides all the features available in a commercial application.
Librepos – A multi-user POS application designed for touch screens, customer displays and barcode scanners.
NOLA – An integrated, all-in-one package for an organization’s inventory, POS, accounting, contact management, billing etc.
TurboCASH – Flexible small business accounting software fulfilling the major needs of any business.
Content Management Systems
80 + Open Source Content Management Systems – A complete roundup of Open Source CMSs from Mashable.
CRM (Customer Relationship Management)
Anteil – Cost effective open source solution for managing and improving customer relationships.
CitrusDB – CitrusDB is a PHP & MySQL based open source customer database solution.
CiviCRM – The world’s first downloadable constituent relationship management system; fund raising software that allows users to manage information about donors, volunteers etc.
Compiere – Offers integrated ERP and CRM suite that enables users to automate the financial, distribution and other needs of their businesses.
Daffodil CRM – Organized and effective way of managing cost-effective customer relationships.
Hipergate – Serving developers, consultants and enterprises to assist them in project management, sales force automation and customer relationship management.
IGSuite – A web-based integrated CRM suite that includes solutions like mailing lists, calendar, contact management and task lists.
Keen CRM/ERP – An advanced, feature packed, comprehensive customer relationship management solution for small companies.
Ohioedge CRM – Ohioedge CRM is an enterprise level open source CRM solution.
OpenCRM – OpenCRM is an open source CRM solution for tracking clients and project management.
OpenCRX – A cross platform professional CRM solution with bug tracking and activity management features.
SellWinCRM – An open source CRM project giving a high level of customization for customers.
SourceTap CRM – SourceTap CRM is a flexible sales force automation solution developed to meet the requirements of sales managers and representatives.
SugarCRM – An open source CRM solution allowing users to track opportunities and manage existing customers while keeping a check on other activities.
Turquoise CRM – Lightweight CRM software built over LAMP with Business Intelligence functionality.
Tustena CRM – Tustena is an enterprise level open source CRM solution written in C#.
vtiger CRM – Built over LAMP/WAMP, Vtiger provides excellent business enhancement utilities and is compatible with multiple platforms.
XRMS CRM – XRMS is an advanced level open source CRM solution that includes a Business Intelligence suite and advanced plugin architecture.
Desktop Environments/ Shell replacements
bbLean – A new version of Blackbox for Windows.
BlackBox For Windows – An alternative shell for Windows that is based stylistically on the Blackbox window manager for the X Window system.
Blueberry 3D-Desktop – Made using Delphi; its main objective is a 3D OPENGL engine in replacement of the Windows desktop.
CyGNOME – A nice tool which ports GNOME desktop to Windows.
DM2 – Provides useful enhancements for Windows in daily work like minimizing windows to floating icons, freeing the taskbar etc.
Geoshell – A shell replacement for Windows that replaces the standard desktop interface items like start menu, taskbar, system tray etc.
KDE-Cygwin – KDE’s port in Windows desktop environment.
LiteStep – A powerful Windows shell replacement under GPL and inspired by AfterStep.
SharpEnvironment – A tool that enables users to personalize every pixel of visible space and customize a single theme in multiple ways with real-time wallpaper effects, icon sets etc.
Virtual Dimension – A fast and fully featured virtual desktop manager that acts as an enhancement to the Windows manager.
xoblite / Blackbox for Windows – An advanced level Blackbox for Windows that is integrated with a system bar.
Columba – A java based email client featuring a user friendly graphical interface.
Daffodil Organizer – Highly flexible way to organize emails; includes import facility from Microsoft Outlook.
Evolution – More popularly billed as the Outlook of Linux, its calendar, address book and other features make it a good option as an email client.
ICEMail – Open source java client with support for the latest email standards.
Mahogany – Cross platform email client supporting UNIX and Win32 platforms.
Mutt – A small and powerful text based email client for UNIX operating systems.
Penelope – The open source version of Eudora currently under beta and planned for full release by this year.
Phoenix Mail – One of the older open source email clients developed using Borland Delphi.
Sylpheed-Claws – An open source email client with an interface similar to Outlook Express; works as an RSS feed reader too.
Thunderbird – A secure email client with several customization options to fit the user’s needs.
Zimbra – Zimbra is currently one of the biggest names in open source, and is the future collaborating and messaging software. Now owned by Yahoo.
Encoding, Conversion & Ripping Tools
Alba Extractor – Alba Extractor is a useful utility for wrapping various mp3 files into one unit for ease of sharing on programs like NapShare etc.
Audacity – Audacity is an open source, cross platform audio editor and is a good solution for creating and editing podcasts.
Avidemux – A free video editor for tasks like cutting and filtering; has support for file types like AVI, DVD etc.
AviSynth – A powerful tool for editing and processing videos.
BonkEnc – A useful application for ripping CDs, encoding and converting audio files to various formats. Users can produce mp3, mp4, FLAC files to name a few.
CD-DA X-Tractor – An open-source CD ripper for 32-bit windows platforms that offers extremely high quality.
CDex – A popular open source digital audio CD extractor.
DivFix – DivFix is a utility for watching partially downloaded DivX movies.
DivXRepair – Based on the VirtualDub model, it cuts off the bad parts and re-assembles the AVI file.
Dr. DivX – The goal of Dr. DivX open source project is to create a portable application with the capability of transcoding many video formats.
DScaler – The DScaler project is an effort to receive top quality videos from Windows computers.
DVD2AVIdg/MPEG2DECdg Decoding Fix – An MPEG decoder suite used for decoding MPEG1 or MPEG2 streams from sources such as DVD VOBs.
DVDx – Popular DVD backup software that converts DVDx movies to high quality DVD movies.
FFmpeg – A complete recording, conversion and streaming solution for audio and video.
GiantDisc – GiantDisc is an open source software package designed to manage thousands of audio tracks.
GNUMP3d – Open source server for streaming mp3s and media.
Gordian Knot – Gordian Knot is an integrated Bit rate calculator package tool for Divx/XviD encoding.
GramoFile – A CD recording utility running on Linux and some other operating systems like UNIX. It enables users to put sounds from gramophone records on CD.
HGRip – A one click solution for converting DVD to XVID files.
JMAC – JMAC is an open source Java implementation library of Monkey’s Audio compression decoder.
LAME – LAME is an MP3 encoder.
Mixere – Mixere is a free, open-source application for mixing audio files. It runs on Windows NT/2000/XP, and supports WAV, AIFF, MP3, Ogg Vorbis, FLAC and Mod audio files.
MMConvert – A multimedia format converter useful for converting media files from one format like AVI/WMV to another format.
mpgtx – A command line MPEG audio/video toolbox useful for joining audio and video files which include MP3, MPEG1, MPEG2 etc.
Mp3splt – A terrific utility to split MP3 and Ogg files from anywhere without decoding.
Mp3Wrap – A useful alternative to wrap two or more mp3 files into a single large mp3 without the loss of file names and other information.
Musepack – A high quality audio compression format.
MusicBrainz Tagger – Provides a database to create a comprehensive music information site. It can be accessed via the client or the internet.
NanDub + BRC – NanDub+BRC includes a bitrate calculator and offers users several advantages as their need for opening separate pieces of software is eliminated.
Open Sound World – A scalable programming environment allowing musicians, researchers and sound engineers to process sound.
OptimFROG – OptimFROG is a zipping utility for audio compression programs; used to reduce the size of audio files.
ShrinkTo5 – A cross platform open source DVD copy engine; allows users to create copies.
SmartRipper – A useful utility for extracting DVD VOB files; loaded with nice features for splitting VOB files, angle processing etc.
Taksi – Taksi allows users to take screenshots and record videos of favorite games and 3D-graphics applications.
Virtual VCR – A compact video capture application designed to work with TV tuner and video capture cards.
WavPack – WavPack is a high quality audio compression format and provides lossless compression.
YAAI – One of the best tools to display information about AVI files; enables users to see data like framerate, used codes, author information etc.
ADempiere Bazaar – Adempiere is a community for open source developers contributing improvements of various applications like Compiere, Helpdesk and Supply Chain etc.
JERPA – JERPA is a Java based advanced level architecture model for ERP software.
JFire – An exchange platform including ERP, CRM and accounting written in Java.
Openbravo ERP – A web based ERP for small and medium enterprises; built on proven MVC architecture facilitating code maintenance and customization.
opentaps – An open source ERP and CRM suite including eCommerce, inventory, warehouse, ledger etc.
Postbooks – A fully integrated ERP solution for small and medium businesses; features a graphical client which runs on Linux, Mac and Windows.
Plazma – Plazma is a Java based ERP and CRM solution.
Sequoia Open Source ERP – The flexible ERP software from Sequoia brings advanced features and scalability for enterprise software along with low TCO.
Tiny ERP – Packed with features like GTK2 client, distributed server, dynamic GUI.
Value – Value is an open source ERP/CRM system and features modular capabilities along with seamless integration.
webERP – webERP is flexible integrated business management software that covers accounts receivable, accounts payable, inventory management and other accounting requirements.
Wyatt – Wyatt is a cross platform ERP package written in Java with J2EE compliance.
Filesharing & FTP
ABC – An enhanced client for the BitTorrent file sharing protocol.
Ares – A file sharing utility enabling users to share digital files like images, audio, video, software and documents.
Azureus – Java enabled BitTorrent protocol packed with special features for beginners and advanced users.
BT++ – An advanced version of the BitTorrent peer-to-peer file sharing protocol with cross-platform support; written in Python.
Cabos – Cabos has an intuitive user interface and is a Gnutella file sharing program based on Limewire.
CoreFTP – A FTP program that enables uploading/downloading/deletion of files and directories, integration with browser, file permission handling etc.
cURL – A command line utility allowing file transfer via FTP, LDAP etc. Users can also use the GET and PUT methods for file downloading and uploading.
Cyberduck – An open source FTP client with support for drag and drop, uploading and downloading, remote file transfer etc.
DC++ – Windows based open source client for unrestricted file sharing over the internet.
eMule-Project.net – A reliable and trusted peer-to-peer file sharing application allowing users to connect from different clients.
FileZilla – FileZilla is a free, fast and reliable open source FTP solution for Windows.
Freenet Project – A free and secure decentralized network of information publishers and consumers.
FrostWire – A completely open source peer to peer client; features community chat room and iTunes integration.
Fugu – An open source graphical front end for secure file transfer; provides support for Mac operating system.
G3 Torrent – A BitTorent client written in Python.
Gnucleus – One of the oldest Windows based open source peer to peer file sharing clients related to Gnutella.
HeavyMole – An advanced level peer to peer file sharing application with features like distributed chat, filtering of answers and advanced query language.
iFTP – i.FTP is a Windows FTP client that comes with source code. There is also an earlier version for BeOS that works with portable media like USB keys.
JFtp – JFtp is a graphical Java network and file transfer client.
KazaaSearch – Search for music, software, images & video with this powerful peer to peer file sharing client.
KCeasy – The windows version of giFT filesharing system that also offers support for other filesharing networks.
Krimpy – An IRC based (internet relay chat) open source file sharing client enabling users to share music, pictures, videos and other files.
Lime Wire – A multi-platform Gnutella file sharing client enabling users to share their files, download MP3s and other audio files.
MLdonkey – 100% open source cross-platform P2P client running on Linux, UNIX, Windows and Mac.
MUTE – A secure, peer to peer file sharing network with easy search and download functionality.
MyNapster – Comes with connection capability to Gnutella for file sharing, IRC for chatting and supports resumption & multithreading of downloads.
NetMess – Has the ability to detect clones and work through HTTP proxy and firewalls.
Prozilla– An open source Linux download accelerator that provides download support via HTTP and FTP protocols.
Shareaza – A flexible file sharing system consolidating features from four different networks: EDonkey2000, Gnutella, BitTorrent, Gnutella2.
TAC2 – Expanded as Tango & Catch 2 (TAC2), works as a search engine independent client for searching on Linux and Windows.
TorrentSpy – Gives BitTorrent power-users all the information in one place along with real time ability to monitor the number of live users.
Waste – Secure collaboration tool allowing idea & data sharing between users through a chat interface.
WinSCP – Another open source SFTP & FTP client for Windows; provides safe file copying between local and remote computers.
XNap – Written in Java, XNap provides a plug-in enabled framework and client for P2P applications.
Graphics-Design & Modeling Tools
Ajax Image Editor – Open source image editor using PHP.
ArgoUML – ArgoUML is a popular open source UML modeling tool compatible with any Java platform.
Avidemux – A simple video editor with support for DVD/DivX conversion and editing.
Blender – 3D animation and modeling suite with various tools for modeling.
Bluefish – A powerful editor for programmers and web designers enabling them to write websites, scripts and programming code.
BRL-CAD – An open source CAD system centered on constructive solid geometry (CSG) modelling.
Cinelerra – A professional open source video editing tool with features for capturing, editing and compositing.
CinePaint – Professional graphical editing application targeted towards the movie industry.
Cornice – Cross platform image viewer initially developed for Linux; similar in functionality to ACDSee.
Dia – Open source drawing tool for UML diagrams, similar in functionality to ‘Visio’.
Flowchart Studio – Allows the user to draw a flowchart through graphical editor.
F-Spot – A feature rich personal photo management application for GNOME desktops.
Gaphor – Simple modeling environment that enables users to create intuitive UML diagrams for documentation purposes.
Gimp – The oldest, and most famous, open source graphic application with over 100 plug-ins and powerful paint tools.
Gimpshop – Gimpshop changes menus and dialogs in a manner similar to its competitor, Photoshop.
GQview – A lightweight image viewer with easy navigation, zoom and thumbnail preview features.
i.Mage – i.Mage is a handy graphics editor featuring easy pixel & image editing.
ImageMagick – Allows for the creation, editing and composition of bitmap images.
imgSeek – imgSeek is a photo management and viewing application with search support.
Imgv – An open source, feature rich image viewer providing support for a variety of image formats.
Inkscape – An open source vector graphics editor similar in functionality to Illustrator. It provides support for all drawing features like any commercial product.
Inquisitor – A fast visual web picture ripper, downloader and offline browser.
Jahshaka – Powerful open source movie editor with real time media playback and visual effects.
Karbon – Part of the open source KOffice suite, makes a great choice as a vector drawing application.
Kino – An open source non-linear video editor that comes with easy importing of DV video and provides video and audio transition effects.
khtml2png – A command line utility for creating PNG and JPEG images out of web pages.
Krita – An open source image editing and painting program with advanced features.
KToon – 2D animation toolkit with focus towards animation industry.
NVU – A complete cross platform web authoring system which makes it very simple to create web pages and manage a website without any technical expertise.
OpenLaszlo – An excellent development environment for web applications as it can generate Macromedia and AJAX files for webpage use.
Paint.NET – .NET based open source bitmap application with an intuitive user interface for drawing and editing.
Page Scavenger – A simple Windows application useful for downloading images from free hosting services via webpage links.
Pixie – Open source RenderMan renderer.
Potrace – An open source project useful for converting bitmap images to raster or vector drawings.
QCad Community Edition – A simple, easy to use open source 2D CAD application.
Quanta Plus – A feature rich web development environment.
Seashore – A basic open source image editor with simple functionality and features.
Scribus – Open source cross-platform desktop publishing application.
Skencil – A flexible open source, interactive vector drawing application for illustrations, diagrams and other purposes.
Synfig – An open source 2d vector animation program for artists to assist them with making cartoons.
UFRaw – Unidentified Flying Raw is an open source photo converter that can be used as a standalone application or as a plug-in.
VirtualDub – An open source video capture and processing utility with basic features.
Violet – Violet is an easy to learn and use open source UML editor.
Xara Xtreme – Powerful, general purpose graphics application for Linux and other UNIX platforms.
AlsaPlayer – AlsaPlayer is a new type of PCM player for Linux/Unix featuring fully pluggable framework for various media types.
Amarok – Audio player for Linux.
Cog – Quite often referred to as a potential iTunes alternative; an interesting open source audio player with support for various formats.
Coolplayer – A fast audio player for the Win32 environment.
Delphamp – Delphi based open source media player. Like a Winamp clone, also features support for Winamp skins.
DigitalDJ – DigitalDJ is a front-end MP3 player based on SQL. It can create playlists and manage CD databases in MP3 format.
Foobar2000 – Advanced level Windows based audio player with support for Unicode and popular audio formats.
Gamp – Gamp is a Gnome audio player written in C and includes support for MP3, Ogg, vorbis etc.
Grip – Grip is a CD-player and ripper for the Gnome desktop, and features an automated front end for MP3 encoders.
Guliverkli – Its interface is similar to Windows media player, however it also offers advanced features like switching of audio streams in mp4 files.
HelixPlayer – An open source media player for various operating systems like Linux, Solaris and Symbian.
Juice – Juice is a premier podcast receiver and allows users to capture and receive podcasts anytime.
Media Player Classic – An advanced version of Windows Media Player 6.4; offers features like real time zoom, support for AVI subtitles and support for QuickTime and Real video.
Mixxx – An open source DJ mixing tool, very useful for professional and amateur DJs.
Miro – The only video player which provides you with the option to download YouTube videos, play video files and play live Internet TV.
MPlayer – Written in Python; one of the best media players under the GNU-GPL license.
MP3Gain – MP3Gain assists users by normalizing the volume of mp3 files; it also does statistical analysis to determine the loudness of a file to the human ear.
musikCube – MP3 player based on embedded SQL database engine and packed with innovative features.
NotifyCD – NotifyCD is a small system tray based CDDB supporting CD player for Windows 9x/NT/2000.
OggPlay – OggPlay is an open source audio player for smart phones.
Plainamp – Plainamp is an open source media player for Microsoft Windows.
SnackAmp – A music player running on multiple platforms; features a web server and powerful playlist.
Songbird – Songbird is a multi-utility open source application; acts as a desktop web player, a jukebox, and a web browser.
SysTrayPlay – Also known as STP, ths is a small MP3 player program with a grey button in the taskbar that occupies very little memory.
VLC media player – Highly portable cross platform multimedia player & streaming server with support for variety of audio and video formats.
Vorbis.com – Open source professional audio encoding and streaming technology.
XboxMediaPlayer – XboxMediaPlayer is an open source multimedia player from Microsoft useful for viewing various video/audio/picture files like VOB, AVI, MP3 etc.
xine – Xine is an open source multimedia player for playing CDs, DVDs and streaming multimedia over the internet.
Zinf – Powerful and effective audio player for Linux and Windows. Supports various file formats such as MP3, Ogg and WAV and also features a download manager and a music browser.
Messengers & Communication Clients
Adium – Mac OS X open source instant messaging client that aggregates the popular IM networks.
aMSN – MSN Messenger’s open source clone for Linux users.
Ayttm – Ayttm is an instant messaging client with all-in-one chat functionality for major instant messaging services.
Coccinella – A Jabber client with integrated whiteboard features; includes features like file transfer, multi-user chat etc.
Kopete – Part of KDE desktop; a wonderful instant messaging application with voice and video capabilities.
Gaim – A very flexible instant messaging application compatible with Linux and Windows offering support for AIM, ICQ, MSN, Yahoo and others.
Ineen – Ineen is a feature loaded open source audio and video conferencing desktop tool.
IRSIM – Uses PHP and mySQL and provides interaction with multiple messaging clients.
Java Jabber Server – A nice open source Java implementation of Jabber instant messenger.
Kopete – Kopete is a flexible instant messenger and multi protocol system with support for AIM, Yahoo, IRC and MSN.
Licq – A C++ based multi-threaded ICQ clone; uses an extensive plug-in system.
MIMP – Mobile version of IMP; functionality includes mailbox viewing, message viewing, deletion or composition of new messages.
Miranda IM – Fast and handy multi-protocol messenger for Windows.
Openfire & Spark – Real time cross-platform IM client and server based on Jabber protocol.
Pidgin – Covers multiple protocols including AIM, ICQ, MSN, IRC, Jabber etc.
PlanetaMessenger.org – Java based open source instant messenger offering plug-in support for various IM networks.
Psi-im – An open source instant messaging client developed for Jabber. Has communication capabilities with AIM, MSN and ICQ etc.
SIM-IM (SIM Instant Messenger) – Free software package providing plug-in based messaging with support for various protocols.
Spark – Open source instant messenger with integrated support for group chat, telephony and security.
TjK – A portal based open source version of AOL Instant Messenger, originally developed for UNIX users.
Tkabber – Open source client for Jabber instant messaging and works on many platforms e.g. Linux, Windows and Mac etc.
WengoPhone – WengoPhone is a popular VOIP soft-phone client for making free PC-to-PC calls over the internet.
XChat – An IRC chat client for both Windows and Linux.
Yafumato Web Messenger – A web-based open source client allowing users to connect to AIM, Gtalk, MSN and Yahoo.
PDF drivers & Tools
CC PDF Converter – Enables users to convert Word, Excel, IE and any other file formats to PDF.
Evince – Evince is a document viewer with support for multiple document formats including PDF.
Jarnal – Jarnal is an open-source application enabling annotation of a document.
okular – A universal document viewer based on KPDF for KDE.
PDFCreator – Create PDF files from just about any Windows utility.
PDF Download – A Firefox extension for improving your surfing experience. A click on a PDF file link enables you to view it inside or outside Firefox.
Pdftk – Pdftk is a command line utility allowing users to merge PDF documents, split PDF documents and do many other things.
qvPDF – Windows based PDF creator implemented as a printer driver.
Sumatra PDF – A simple and fast application to view PDF files.
Xpdf – An open source PDF viewer for the UNIX operating system. Also works under Windows as a command line tool.
Personal Information & Task Managers
Aethera – Aethera is a PIM application with communication features like send/receive email, send/receive tasks and appointment requests etc.
Chandler – Turns your inbox into a task list.
KAddressBook – An address book application for the K Desktop environment.
Kontact – Supports news, email, calendars, to-do list; a personal information manager for KDE.
KOrganizer – A personal organizer of the KDE desktop environment; has the ability to manage calendars and to do list.
Nag – Nag is a task list manager for multiple users and allows them to create many task lists which can be shared between users and groups.
OneOrZero – Easy to customize cross platform, enterprise level task management and help desk solution.
OpenSync – Open source synchronization framework for managing PIM data such as contacts, calendar, tasks and notes.
PTM – An open source time tracking tool.
Task Blocks – A simple task scheduling application to ensure that user tasks do not overlap.
Task Coach – Task Coach is an open source personal task manager providing features to deal with complex tasks.
TaskFreak – Simple web-based task manager written in PHP.
Total Text Container – An open source information manager; stores notes, passwords, images, calendar events etc.
Achievo – Easy to use and customize open source web-based project management application for business environments.
AgileTrack – Java based application for monitoring and tracking activities in a software development environment.
ASTS – A set of web based management tools for recording project activities and tasks.
Austin – A command line utility for manipulating project timelines in XML.
dotproject – Open source Project Management application developed and supported by a group of volunteers.
Double Choco Latte – A basic project management application used to track the history of work orders, projects, accounts etc.
eHour – User friendly web-based tool for keeping track of time based activities; ideal for consulting companies.
FreeMind – A mind mapping application useful for brainstorming sessions.
FUTURe – A time management application for individuals and groups.
Ganttproject – Written in Java, and using XML file format; enables project planning through a Gantt chart.
JIRA – JIRA is a project management & task achievement application for making team processes easy.
jxProject.com – Cross platform project management tool with sharing options.
IPM – A simple project management application built in PHP4 and requiring Apache 1.3x and MySQL.
Memoranda – For users handling multiple projects on a daily basis Memoranda is an ideal tool.
NetOffice – An online project management application for managing tasks, projects, team tracking and collaboration between teams.
Open Workbench – Excellent Windows-based application providing project scheduling functionality for enterprise users.
Planner – Project management tool for the Gnome desktop that is useful for project scheduling, planning and tracking.
phpCollab – An open-source internet-collaboration tool for project teams allowing them to share information amongst each other.
project-open – A web-based project management system for small consulting and service companies. Covers sales, project planning, collaboration and CRM.
Projectory – Projectory is an open source web based project management tool for tracking software projects through development phases.
Projman – A project management tool for reading project descriptions and their scheduled tasks.
Rapla – Highly configurable event and resource management application primarily targeted towards universities.
Taskjuggler – A powerful tool with redefined approach towards project planning activities, taking it far beyond the commonly available tools for Gantt charts.
Trac – Wiki and issue management system for software development projects.
TrackIt – An open source web based project tracking tool to maximize flexibility and customization.
TUTOS – Organization management tool for satisfying the requirements of small groups, teams and departments.
User Story .NET – A tool for extreme programming projects in user story tracking.
WebCollab – An easy to use collaborative project management system enabling users to work together.
WebPBC – Web-based project management tool for small businesses to do budget allocation of projects.
XPlanner – Another web-based project management tool for eXtreme programming (XP) software development practices.
BIRT Project – An Eclipse-based reporting system.
DataVision – A reporting tool that works with any database and generates customized reports.
Jasper Reports – A leading open source reporting engine delivering rich screen content and printer into various file formats: PDF, HTML and XLS etc.
JERT – JavaEye Reporting Tool is a web-based database reporting tool with sharing features. It enables users to create flexible reports without any programming knowledge.
iReport – iReport is an easy to use visual report builder designed and written purely in Java.
openi.org – Pronounced as “open eye”, this is a web-based open source OLAP reporting tool enabling organizations of different sizes to manage and organize their data.
OpenSMART – Similar to Tivoli, a monitoring and data reporting tool for servers.
Pentaho – Open source business intelligence tool enabling organizations to operate more effectively by providing reporting, analysis, workflow capabilities.
Rapid – I – Offers all types of data mining services (from analysis to customization) helping customers to improve their profitability and efficiency.
SpagoBI – Focused business intelligence solution for the enterprise providing complete set of analytics (e.g. reporting, data mining, dashboards etc.)
xTuple – Open source SQL report writer compatible with Windows, Linux and Mac.
Aggie – Aggie is a desktop based open-source news aggregator that downloads the latest news in a webpage.
AmphetaDesk – A cross platform, open source news aggregator that downloads news items on the user’s desktop.
BlogBridge – A powerful and flexible desktop based open source feed reader for Windows, Linux and Mac.
BottomFeeder – RSS news aggregator client written in Smalltalk and compatible with Linux, Windows, Mac and Solaris.
Gregarious – A web-based RSS/RDF/Atom feed reader designed for users to run on their own web server.
JRssReader – A fast, Java based RSS & RDF reader; offers compatibility with multiple platforms.
NewsFeed – Flexible RSS/RDF/Atom aggregator for different operating systems like Linux, MacOS and FreeBSD.
NRss – an “open source Microsoft .NET Framework / Mono class library for reading a RSS feed into a tree of objects mapped to elements in the RSS feed.”
RSSOwl – Java-based open source news reader.
Syndirella – Syndirella is an open source desktop information aggregator providing a user friendly environment for reading information from multiple sources or feeds.
ThinFeeder – Very powerful and tiny open source aggregator for RSS/Atom developed in Java language.
7-Zip – High-compression open source archive utility for Windows with support for 7z, ZIP, GZIP, TAR files etc.
Amanda – Network backup solution.
Bacula – Set of open source computer programs for managing network backup system for Linux/Unix, Mac and Windows clients.
BiGZip – Free compression utility based in Java.
Burn – An open-source CD and DVD burning application allowing users to create audio, data and video disks in different file formats.
CamStudio – Open screen casting application allowing users to capture audio and video and store it later for playback.
CDRDAO – Open-source tool with advanced features for recording audio or data CDs.
coLinux – Cooperative Linux allows users to run Linux parallel to Windows on any machine.
Cream – An open source text editor with interactive user interface, pull-down menus etc.
G4U – Open source cross-platform hard disk image cloning application.
GrenEye – A file slicing and compression utility.
GNU zip – A compression utility.
GParted – Fantastic open source partition manager with direct boot facility option from CD or USB.
Handbrake – A multiplatform DVD to MPEG-4 converter/ripper with ability to process unencrypted and whole DVD files.
InfraRecorder – A freeware CD/DVD burning application for Windows.
Info-ZIP – Provides high quality, portable versions of zip files compatible with DOS.
Inno Setup – Another open source installer for Windows applications with integrated Pascal scripting engine.
InstallJammer – Useful for creating self-contained cross platform installation packages.
jEdit – A cross platform open source text editor written in Java with consolidated features from major editors.
Emacs – An extensible, customizable, self-documenting open source text editor.
K3b – An open source application for creating/burning CDs and DVDs; packed with features like DVD encoding, copying and audio CD creation.
Launch4j – An open source wrapper for jar files that supports Mac, Linux and Solaris.
Nagios – An open source network monitoring service for hosts, networks and services which use plug-ins.
NeDi – Open source network discovery, inventory & management framework utilizing scheduled discovery for network examination.
Notepad++ – An open source alternative to Microsoft Notepad with features well suited to development and design.
NSIS – A flexible open source tool for developing Windows installers.
Open-source ARJ – A cross-platform open source implementation of the popular ARJ archiver.
OpenNMS – A network management platform for monitoring services and their hosts.
OpenVZ – A terrific alternative to any commercial visualization offering; offered only on Linux.
Pandora FMS – Complete network and node monitoring solution composed of three parts: agents, server and console.
Partition Image – Disk cloning Linux utility helping users to create an image of partitions. The image file can be compressed, split and it is compatible with Linux and Windows.
SciTE – An open source text editor enabling developers to edit code.
UPX – A high-performance packaging utility with a high compression ratio for different executable formats.
VirtualBox – A high performance, feature rich, open source visualisation product for enterprise as well as home use.
Wireshark – Top quality network protocol analyser enabling users to capture LAN packets.
Xen – A high performance open source enterprise visualisation solution.
Xming – X-Windows server for Windows; has all the features of a commercial product.
Xvidcap – Linux based screencast application allowing users to capture portions or the entire screen of a Linux desktop.
Zenoss – A top class network and system monitoring solution with all the features of a commercial monitoring system.
Zzip – A compression tool with the ability to compress files with a high compression ratio.
AbiWord – Has an interface that is very similar to Microsoft Word for easy migration; also allows importing and exporting from Microsoft Word.
Agnubis – The PowerPoint of GNOME; comes with easy integration options with other packages in GNOME office suite.
Andrew User Interface System (Andrew) – A popular graphical user interface system integrated with word processor, an html editor and browser.
AxPoint – Presentation tools from the developers of Apache AxKit.
Bruce – Presentation tool for Python programmers allowing them to code and create interactive PowerPoint sessions.
Imposter – Imposter is a standalone viewer for viewing presentations created by Impress software.
Impress – Fantastic tool for creating multimedia presentations with 2D and 3D effects.
Kivio – A part of KOffice suite; helps users in flowcharting, network diagrams and other graphics needs.
KPresenter – The presentation package bundled with KDE project; powerful and fully featured.
KWord – A word processor with a frame-based layout capability; part of the open source office suite KOffice.
MagicPoint – A presentation tool based on X11; very useful for making simple presentations which can be easily edited by any text editor.
NeoOffice – A special version of OpenOffice for the Mac.
S5 – A simple slideshow system having easily accessible markup. It can easily adapt to user themes and enables you to create your own slideshow themes.
WebHuddle – An open-source web conferencing and presentation tool with support for VOIP, chat and PowerPoint.
Browser3D – An interactive web browser enabling users to interact with a real 3D environment and add their own 3D environment.
Camino – The functionality and features of this powerful browser match the capabilities of Safari.
CxBrowser – A useful open source web browser implemented under Mozilla Activex control component and written entirely in C#.
Epiphany – Developed for the GNOME computer desktop; competes with KDE for Linux.
Galeon – The first web browser for GNOME computer desktop; now comes as an extension to Epiphany.
K-Meleon – Perfect web-browser for operating systems which are incompatible with Mozilla or Firefox suite of browsers.
Konqueror – Part of the K Desktop Environment (KDE); a great browser for Linux with similar features to Firefox.
Lynx – Cross platform browser compatible with UNIX, Windows and Mac.
Mozilla Firefox – Fast, powerful and secure web browser compatible with Linux and Windows.