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Debian is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian uses the Linux kernel (the core of an operating system), but most of the basic OS tools come from the GNU project; hence the name GNU/Linux.
Fedora is a free operating system that offers the best combination of stable and cutting-edge software that exists in the free software world. Latest version is Fedora 9!
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
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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. [Less]
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.
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.
OpenSolaris is an open source project created by Sun Microsystems to build a developer community around the Solaris Operating System technology.
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.
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
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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. [Less]
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
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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 integrated, lightweight, easy-to-program, powerful, high-performance graphical desktop environment which avoids legacy OS paradigms that frustrate developers and have hindered the computing masses' adoption of a free-software desktop.
Syllable Server is a matching small and efficient Linux server. [Less]
Vyatta software is a Linux-based, open-source networking (router, firewall, VPN) solution that leverages x86 hardware and components to deliver a flexible, affordable alternative to Cisco 1800 through 7200 series routers. Vyatta is a enterprise class, commercial open source offering with a staff of full-time engineers and support personnel.
The HelenOS project is an effort to develop a complete and usable modern operating system, yet offering room for experimenting and research. HelenOS uses its own microkernel written from scratch and supports SMP, multitasking and multithreading on
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both 32-bit and 64-bit, little-endian and big-endian processor architectures, among which are AMD64/EM64T (x86-64), ARM, IA-32, IA-64 (Itanium), 32-bit MIPS, 32-bit PowerPC, SPARC V9 and Xen 3.0. Thanks to the relatively high number of supported architectures and suitable design, HelenOS is extremely-well portable. [Less]
PM2 is a low level generic runtime system which integrates multithreading management (Marcel) and a high performance multi-cluster communication library (Madeleine).
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.
Openwall GNU/*/Linux (or Owl for short) is a security-enhanced server platform. The primary approaches to security are proactive source code review, privilege reduction, privilege separation, careful selection of third-party software, safe defaults
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, "hardening" to reduce the likelihood of successful exploitation of security flaws, and the uses of "strong" cryptography. Also available are policy enforcement and integrity checking capabilities.
Besides the security enhancements, other key properties of Owl include the ability to rebuild the entire system from source with one simple command ("make buildworld"), support for software packages found in or developed for Red Hat's and compatible Linux distributions, and support for multiple architectures (currently x86, x86-64, SPARC, and Alpha). [Less]
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.
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
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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 experience, allowing you to get the most out of your computing time. With PC-BSD you can spend less time working to fix viruses or spyware and instead have the computer work for you. [Less]
L4Ka::Pistachio is the latest L4 microkernel developed by the System Architecture Group at the University of Karlsruhe in collaboration with the DiSy group at the University of New South Wales, Australia. It is the first available kernel
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implementation of the L4 Version 4 kernel API (currently code-named Version X.2), which is fully 32 and 64 bit clean, provides multiprocessor support, and super-fast local IPC. [Less]
Parallel python module (pp) provides an easy and efficient way to create parallel-enabled applications for SMP computers and clusters. pp module features cross-platform portability and dynamic load balancing. Thus application written with pp will
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parallelize efficiently even on heterogeneous and multi-platform clusters (including clusters running other application with variable CPU loads). Visit http://www.parallelpython.com for further information. [Less]