Operating Systems/Distributions

• FreeBSD
• FreeBSD is a UN*X-like operating system for the i386, IA-64, PC-98, Alpha/AXP, and UltraSPARC platforms based on U.C. Berkeley's "4.4BSD-Lite" release, with some "4.4BSD-Lite2" enhancements. It is also based indirectly on William Jolitz's port of U.C. Berkeley's "Net/2" to the i386, known as "386BSD", though very little of the 386BSD code remains. FreeBSD is used by companies, Internet Service Providers, researchers, computer professionals, students and home users all over the world in their work, education and recreation.
• Solaris
• Solaris is a computer operating system, the proprietary Unix variant developed by Sun Microsystems. Early versions, based on BSD UNIX, were called SunOS. The shift to a System V code base in SunOS 5 was marked by changing the name to Solaris 2. Earlier versions were retroactively named Solaris 1.x. After version 2.6, Sun dropped the "2." from the name. Solaris consists of the SunOS UNIX base operating system plus a graphical user environment. Solaris is written in a platform-independent manner and is available for SPARC and x86 processors (including x86_64). Historically, Solaris used to be a proprietary operating system, however, starting from version 10, its licence has changed and the product is now distributed free of charge for any system or purpose, while its source code is available from OpenSolaris.org under a license approved by Open Source Initiative (OSI).
• OpenSuse
• The openSUSE project is a community program sponsored by Novell. Promoting the use of Linux everywhere, this program provides free, easy access to openSUSE, a complete Linux distribution. The openSUSE project has three main goals: make openSUSE the easiest Linux for anyone to obtain and the most widely used Linux distribution; leverage open source collaboration to make openSUSE the world's most usable Linux distribution and desktop environment for new and experienced Linux users; dramatically simplify and open the development and packaging processes to make openSUSE the platform of choice for Linux developers and software vendors.
• Alinux
• aLinux (formerly Peanut Linux) is an independently developed Linux distribution with RPM package management.
• Ubuntu
• Ubuntu is a complete desktop Linux operating system, freely available with both community and professional support. The Ubuntu community is built on the ideas enshrined in the Ubuntu Manifesto: that software should be available free of charge, that software tools should be usable by people in their local language and despite any disabilities, and that people should have the freedom to customise and alter their software in whatever way they see fit. "Ubuntu" is an ancient African word, meaning "humanity to others". The Ubuntu distribution brings the spirit of Ubuntu to the software world.
• Mandriva
• Mandriva Linux (formerly Mandrakelinux) was created in 1998 with the goal of making Linux easier to use for everyone. At that time, Linux was already well-known as a powerful and stable operating system that demanded strong technical knowledge and extensive use of the "command line"; MandrakeSoft saw this as an opportunity to integrate the best graphical desktop environments and contribute its own graphical configuration utilities and quickly became famous for setting the standard in ease-of-use and functionality. With this innovative approach, Mandriva Linux offers all the power and stability of Linux to both individuals and professional users in an easy-to-use and pleasant environment. Thousands of new users are discovering Linux each and every day and finding it a complete replacement for their previous operating system. Linux as a server or workstation has no reason to be jealous of any other more established operating systems.
• Slax
• SLAX - Live CD is a bootable CD containing a Linux operating system. It runs directly from CD-ROM without installing. The live CD described here is based on the Slackware Linux distribution and is downloadable from its website as an ISO image. All scripts and source code which can be used to build your own live CD are also available.
• Dream Linux 
• Dreamlinux is a Brazilian distribution based on Debian, Knoppix and Morphix. A live CD with a graphical hard disk installation option, it boots directly into an XFce desktop which provides access to a good collection of desktop applications and a central control panel for system configuration.
• Fedora Core
• The Fedora Project is an openly-developed project designed by Red Hat, open for general participation, led by a meritocracy, following a set of project objectives. The goal of The Fedora Project is to work with the Linux community to build a complete, general purpose operating system exclusively from open source software. Development will be done in a public forum. The project will produce time-based releases of Fedora Core about 2-3 times a year, with a public release schedule. The Red Hat engineering team will continue to participate in building Fedora Core and will invite and encourage more outside participation than in past releases. By using this more open process, we hope to provide an operating system more in line with the ideals of free software and more appealing to the open source community.
• Damn Small Linux
• Damn Small Linux is a business card size (50MB) Live CD Linux distribution. Despite its minuscule size it strives to have a functional and easy to use desktop. Damn Small Linux has a nearly complete desktop, including XMMS (MP3, and MPEG), FTP client, links-hacked web browser, spreadsheet, email, spellcheck (US English), a word-processor, three editors (Nedit, nVi, Zile [emacs clone]), Xpdf, Worker (file manager), Naim (AIM, ICQ, IRC), VNCviwer, SSH/SCP server and client, DHCP client, PPP, PPPoE, a web server, calculator, Fluxbox window manager, system monitoring apps, USB support, and soon it will have PCMCIA support as well. If you like Damn Small Linux you can install it on your hard drive. Because all the applications are small and light it makes a very good choice for older hardware.
• Quantian
• A Knoppix/Debian variant tailored to numerical and quantitative analysis, Quantian is a remastering of Knoppix, the self-configuring and directly bootable CDROM that turns any PC or laptop (provided it can boot from CDROM) into a full-featured Linux workstation. The most recent version is based on clusterKnoppix and adds support for openMosix, including remote booting of light clients in an openMosix terminal server context. Quantian is an extension of Knoppix and clusterKnoppix from which it takes its base system of about 2GB of software, along with fully automatic hardware detection and configuration. However, Quantian differs from Knoppix by adding a set of programs of interest to applied or theoretical workers in quantitative or data-driven fields.
• Knoppix
• Knoppix is a bootable CD with a collection of GNU/Linux software, automatic hardware detection, and support for many graphics cards, sound cards, SCSI and USB devices and other peripherals. Knoppix can be used as a Linux demo, educational CD, rescue system, or adapted and used as a platform for commercial software product demos. It is not necessary to install anything on a hard disk. Due to on-the-fly decompression, the CD can have up to 2 GB of executable software installed on it.
• mcn-live
• MCNLive is a Mandriva-based live CD developed by MandrakeClub.nl in the Netherlands.
• Geebox
• GeeXboX is a full operating system, running under Linux and based on the excellent MPlayer. No need of hard drive, you just have to put the GeeXboX bootable CD into the CD-Drive of any pentium-class computer to boot it. Moreover, GeeXboX is a free software, created thanks to many open-source software. This means that everyone can modify it and build his own release of the GeeXboX. You may wonder why you could have to boot on another operating system to play your media files, but just think about the Mini-ITX plateforms like VIA Epia/Eden or Shuttle barebones. It's now affordable to bring DivX to your home cinema, pluging this kind of computers directly to your TV. At the time of the first development release (December 2002), it was only able to play DivX movies, but for now, nearly every kind of media files can be played from GeeXboX.
• Miscellaneous
• Miscellaneous distributions or the distributions that are spinoffs of other distributions. Google around for further infomation on them.
• More coming soon