Fedora Core

Fedora Core is RedHat's plan to develop a complete, general purpose operating system exclusively from free software. The distribution was created to replace low-end, comsumer versions of RedHat Linux.

• http://fedora.redhat.com/
• Intel compatible, PPC, 64 bit
• Mainstream/General Public, Red Hat based, Fedora Core based
• Download

Debian GNU/Linux

Debian GNU/Linux is a free distribution of the Linux based operating system.It is maintained and updated through the work of many users who volunteer their time and effort. Along with its large selection of prepackaged software is contains advanced package management tools that allow for easy installation and maintenance on individual systems and workstation clusters. Extensive pre-release testing is done to ensure the highest degree of reliability possible, and a publicly accessible bug tracking system provides an easy way to monitor customer feedback

• http://www.debian.org/
• Intel compatible, PPC, Alpha, Sparc, Other, Mainframe, m68k
• Mainstream/General Public, Debian based
• Download

Pardus

Pardus is a GNU/Linux distribution funded and developed by the Scientific & Technological Research Council of Turkey. Pardus has a range of unique features, such as Mudur, a start-up framework of Pardus to speed up the boot process, and PiSi, an efficient package management system with a user-friendly graphical interface.

• http://www.pardus.org.tr/
• Intel compatible
• Mainstream/General Public
• Download

Red Hat Enterprise Linux

Red Hat Enterprise Linux is a high-end Linux distribution geared toward businesses with mission-critical needs.

• http://www.redhat.com/
• Intel compatible, Alpha, Itanium
• Mainstream/General Public, Red Hat based
• Download (SSL)

Mandriva

Mandriva Linux is a powerful operating system that is available for many platforms: 32 bit processors such as Intel Pentium®, AMD Athlon®, PowerPC®; and 64 bit processors such as Intel Itanium® and AMD Opteron®. Mandriva Linux includes many graphical administration assistants & wizards that make it intuitive and fun to use while providing all the power and robustness of other Linux systems. Hundreds of included applications make it an ideal solution for both professional and home users.

• http://www.mandriva.com
• Intel compatible, PPC, 64 bit
• Mainstream/General Public, Red Hat based
• Download

CentOS

Enterprise Linux system based on freely available Red Hat sources.

• http://www.centos.org/
• Intel compatible
• Red Hat based, Power user
• Download

Knoppix

Full-featured Linux distribution that boots from a CD. Includes the latest version of KDE and OpenOffice. Can be used to work from Linux on PCs without actually installing it, so it is ideal for demonstrations of Linux. Based on Debian.

• http://www.knoppix.org/
• Intel compatible
• Minimalist, Debian based, Mainstream/General Public, Live CD
• Download

Trustix Secure Linux

Trustix Secure Linux is a project to make a hardened Linux distribution for servers. It features OpenSSL, OpenSSH, Apache w/SSL&PHP, Postfix, POP3 and IMAP with SSL support, ProFTP, and ftpd-BSD.

• http://www.trustix.net/
• Intel compatible
• Security enchanced, Red Hat based
• Download

Arch Linux

A Linux Distribution optimized for the i686 architecture.

• http://www.archlinux.org/
• Intel compatible
• Mainstream/General Public, Power user
• Download