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[1973 users on Ohloh]
Ubuntu is a complete Linux-based operating system, freely available with both community and professional support. It is developed by a large community and we invite you to participate too!
Fedora Packages
[252 users on Ohloh]
Fedora is a free operating system that offers the best combination of stable and cutting-edge software that exists in the free software world.
[230 users on Ohloh]
FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, IA-64, PC-98 and ARM architectures. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. It is developed and maintained by a large team of individuals. Additional platforms are in various stages of development.
Kubuntu Linux
[194 users on Ohloh]
Kubuntu is a a user friendly operating system based on KDE, the K Desktop Environment. With a predictable 6 month release cycle and part of the Ubuntu project, Kubuntu is the GNU/Linux distribution for everyone.
openSUSE Linux
[148 users on Ohloh]
The openSUSE project is a community program sponsored by Novell. Promoting the use of Linux everywhere, openSUSE.org provides free, easy access to the world's most usable Linux distribution, openSUSE. The openSUSE project gives Linux developers and enthusiasts everything they need to get started with Linux.
Mandriva Linux
[50 users on Ohloh]
Mandriva Linux is a community-based Linux distribution, suitable for a wide range of solutions: from clustering to servers, firewalls and - most commonly - desktops. Mandriva Linux has a long history of open development, especially via the "Cooker", a fluid distribution that resembles a stable release for a few weeks every six months.
Parsix GNU/Linux
[49 users on Ohloh]
Parsix GNU/Linux is a live and installation CD derived from KANOTIX and based on Debian. It is a complete GNOME centric desktop oriented distribution. Beside of the dozens supported languages, Parsix GNU/Linux also supports Persian keyboard and users can switch to Persian with Alt+Shift keys. You can install and use Parsix GNU/Linux as your PC's operating system.
[44 users on Ohloh]
Xubuntu uses the Xfce desktop environment, meaning that it will run fast while still delivering a user-friendly interface. Older computers feel lively again, while newer ones will run faster than ever before!
Pardus Linux
[38 users on Ohloh]
Pardus is GNU/Linux distribution developed by TUBITAK/UEKAE according to computer literates' basic desktop needs; uses existing distributions' dominant parts as concept, architecture or code; provides easy use, configuration, installation with configuration environment and tools that can be converted to an autonomous system.
[12 users on Ohloh]
The AROS Research Operating System is a lightweight, efficient and flexible desktop operating system, designed to help you make the most of your computer. It's an independent, portable and free project, aiming at being compatible with AmigaOS 3.1 at the API level (like Wine, unlike UAE), while improving on it in many areas.

The source code is available under an open source license, which allows anyone to freely improve upon it.

ALT Linux
[11 users on Ohloh]
ALT Linux is a set of Linux distributions that are based on Sisyphus, an APT-enabled RPM package repository that aims to achieve feature completeness, usability, and security in a sensible and manageable mixture.
Syllable operating system family
[10 users on Ohloh]
The goal of the Syllable project is to create a family of easy-to-use free software operating systems. It is the continuation of the BeOS-like AtheOS.

Syllable Desktop has its own C kernel with symmetric multiprocessing, multithreaded pre-emptive multitasking, high POSIX compliancy, 64-bit journaled filesystem (AFS) with metadata, an integrated native GUI architecture with an object-oriented C++ API, SDL, singular native toolkit and multi-user desktop environment. The system seeks to be an...

[8 users on Ohloh]
Foresight Desktop Linux is a GNOME based Linux distribution that showcases some of the latest bells and whistles. It currently sports GNOME 2.20 as the preferred desktop environment.

Foresight, because your desktop should be freaking cool.

[4 users on Ohloh]
AuroraUX is an operating system distribution based on the OpenSolaris kernel source base. The goal of the AuroraUX project is to create a high reliability core operating system using the US Department of Defense-developed Ada programming language. While it is meant to be minimalistic and used as a base for other distributions, it will also be functional as an operating system in itself.

#auroraux @ irc.freenode.net

[4 users on Ohloh]
MidnightBSD is a desktop operating system for ia32 and amd64/emt64 computers. It uses GNUstep and related software to provide an easy to use environment.
[4 users on Ohloh]
PC-BSD is a free operating system with ease of use in mind. Like any modern system, you can listen to your favorite music, watch your movies, work with office documents and install your favorite applications with a setup wizard at a click.

PC-BSD is a complete desktop operating system, which has been designed with the "casual" computer user in mind. It offers the stability and security that only a BSD-based operating system can bring, while as the same time providing a comfortable user exp...

[3 users on Ohloh]
A GNU/Linux distribution meant to be a ready to use operating system for notebooks, desktop and servers.
It provides software for office, multimedia, games and much more. It was created by mambaSoft as a community based development project.
[2 users on Ohloh]
Chakra is a GNU/Linux distribution based on Arch Linux and KDEmod.

While being as flexible and configurable as Arch, it delivers an out-of-the-box experience that can be tested with a Live-CD.

Chakra adhers to Arch's KISS principle, so whenever possible, functionality is added without patching upstream packages.

However, KDE is consequently modularized resulting in the highly praised KDEmod system.

Ark Linux
[1 users on Ohloh]
Ark Linux is a Linux distribution for everyone - designed to be easy to install and learn for users without prior Linux (or computer) experience, while powerful enough for longtime Linux users. Ark Linux is based on KDE desktop environment.
[0 users on Ohloh]
ONYX GNU/Linux is a completely original, from-scratch Linux distribution available in both desktop and server flavors. It aims to provide a stable, resource-friendly, and aesthetically-pleasing environment that works 100% on all hardware out-of-box.

ONYX is low-maintenance and engineered for long "shelf life," making it the perfect long-term software solution. Following this stability and longevity model, ONYX will support each released version for a minimum of two years, only releasin...