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[2533 users on Ohloh]
OpenOffice.org is a multiplatform and multilingual office suite and an open-source project. Compatible with all other major office suites, the product is free to download, use, and distribute.
[2014 users on Ohloh]
GIMP is an acronym for GNU Image Manipulation Program. It is a freely distributed program for such tasks as photo retouching, image composition and image authoring.

It has many capabilities. It can be used as a simple paint program, an expert quality photo retouching program, an online batch processing system, a mass production image renderer, an image format converter, etc.

GIMP is expandable and extensible. It is designed to be augmented with plu...

[1802 users on Ohloh]
Thunderbird delivers. Enjoy safe, fast, and easy email, with intelligent spam filters, quick message search, and customizable views. Brought to you by Mozilla, Thunderbird makes email better.

User web site:

[781 users on Ohloh]
Inkscape is a drawing tool with capabilities similar to Illustrator, Freehand, and CorelDraw that uses the W3C standard scalable vector graphics format (SVG). The supported SVG features include basic shapes, paths, text, markers, clones, alpha blending, transforms, gradients, and grouping. In addition, it supports Creative Commons meta-data, node-editing, layers, complex path operations, text-on-path, and SVG XML editing. It also imports several formats like EPS, Postscript, JPEG, PNG, BMP, and ...
[680 users on Ohloh]
The K Desktop Environment (KDE) is a graphical desktop, a set of applications and a development platform. It is created by a community of people dedicated to create a free and user-friendly computing experience. KDE offers all necessary means to easily build all kinds of applications upon.

KDE has been around since 1996, with code change history dating back at least to 1997.

KDE is one of the biggest free software C++ project around and one of the two leaders of unix desktops.

[542 users on Ohloh]
Rediscover Your Music!

Amarok is the music player for Linux and Unix with an intuitive interface. Amarok makes playing the music you love easier than ever before - and looks good doing it.

[530 users on Ohloh]
Wine is an implementation of the Windows API on top of X and Unix. It does not require Microsoft Windows, but can use native Windows DLLs if they are available. It provides both a development toolkit for porting Windows source code to Unix as well as a program loader, allowing many unmodified Windows programs to run on x86-based Unixes.
[321 users on Ohloh]
Unified OS X instant messaging platform
Clam AntiVirus
[286 users on Ohloh]
Clam AntiVirus (ClamAV) is an anti-virus toolkit for Unix. The main purpose of this software is the integration with mail servers (attachment scanning). The package provides a flexible and scalable multi-threaded daemon, a commandline scanner, and a tool for automatic updating via Internet. The programs are based on a shared library distributed with the Clam AntiVirus package, which you can use in your own software.
[246 users on Ohloh]
BitTorrent is a tool for copying files from one machine to another. FTP punishes sites for being popular. Since all uploading is done from one place, a popular site needs big iron and big bandwidth. With BitTorrent, clients automatically mirror files they download, making the publisher's burden almost nothing.

Prior to version 6.0, BitTorrent was written in Python, and was free software. The source code for versions 4.x and 5.x are released under the BitTorrent Open Source License, a modif...

[223 users on Ohloh]
Qt is a cross-platform application and UI framework. Using Qt, you can write applications once and deploy them across many desktop and embedded operating systems without rewriting the source code.
[209 users on Ohloh]
Growl is a notification system for Mac OS X: it allows applications that support Growl to send you notifications.
[176 users on Ohloh]
FreeMind is Mind-Mapping tool and an intuitive editor for tree-structured data. It features a modular design, and can be used to edit any kind of data, dependent on the current mode. The data is represented as a Mind-Map, while data, behavior, node style, edge style, color, etc. are determined by the mode. It features one-click fold, unfold, and "follow link" operations.
[154 users on Ohloh]
KTorrent is a light and full-featured bittorrent program. It supports:
- ĀµTorrent compatible peer exchange
- Zeroconf extension to find peers on the local network
- WebGUI plugin
- RSS plugin
- Grouping feature to put torrents into groups
- UDP Trackers
- Port forwarding with UPnP
- IP blocking plugin
- Importing of partially or fully downloaded files
The MacPorts Project
[148 users on Ohloh]
The MacPorts Project's main goal is to provide an easy way to install various open-source software products on the Darwin OS family (OpenDarwin, Mac OS X and Darwin)

There are currently about 5600 completed and usable ports, with more being added on a regular basis.

KDElibs (KDE)
[145 users on Ohloh]
The KDE libraries, basis of KDE and used by many open source projects. They are based on Qt, Trolltech's cross-platform toolkit, and run on Linux, BSDs, and other Unices, as well as Microsoft Windows and Mac OS X.

Licensed under GNU LGPL, they may be used by open source and proprietary applications.

[144 users on Ohloh]
Traditionally, chat clients on the Mac have been anything but glamorous. Colloquy is an advanced IRC, SILC & ICB client which aims to fill this void. By adhering to Mac OS X interface conventions, Colloquy has the look and feel of a quality Mac application.
[139 users on Ohloh]
DOSBox uses SDL to emulate the PC hardware required for running old DOS games. This includes a 386 processor, an S3/Trio video card with some tweaks to allow for older display hardware like the Tandy, a Sound Blaster Pro, the PC speaker, Tandy 3-sound, CMS/GameBlaster, Disney Sound Source, and MIDI. DOS emulation is integrated. It is possible to mount local directories as drives inside the emulator.
[139 users on Ohloh]
WebKit is an open source web browser engine. WebKit is also the name of the Mac OS X system framework version of the engine that's used by Safari, Dashboard, Mail, and many other OS X applications. WebKit's HTML and JavaScript code began as a branch of the KHTML and KJS libraries from KDE.
Simple DirectMedia Layer
[136 users on Ohloh]
A cross-platform multimedia library designed to provide low level access to audio, keyboard, mouse, joystick, 3D hardware via OpenGL, and 2D video framebuffer.

SDL supports Linux, Windows, Windows CE, BeOS, MacOS, Mac OS X, FreeBSD, NetBSD, OpenBSD, BSD/OS, Solaris, IRIX, and QNX. The code contains unofficial support for AmigaOS, Dreamcast, Atari, AIX, OSF/Tru64, RISC OS, SymbianOS, and OS/2.

SDL is written in C, but works with C++ natively, and has bindings to several other language...