What is debian?

Debian

Debian ( /ˈdɛbiən/) is a computer operating system composed of software packages released as free and open source software primarily under the GNU General Public License along with other free software licenses. Debian GNU/Linux, which includes the GNU OS tools and Linux kernel, is a popular and influential Linux distribution. It is distributed with access to repositories containing thousands of software packages ready for installation and use.

Read more about Debian.

Some articles on debian:

Crunch Bang Linux - Move To Debian
... the distribution is based directly on Debian and no longer on Ubuntu. 10 was made available for live CD download on i686, i486, or amd64 (Based on Debian 6.0 stable, which was released on that day) ...
Sidux - Software
... Aptosid Releases contain only free software as defined by the Debian Free Software Guidelines (DFSG) ... such as codecs, plugins and wlan firmware can be enabled by configuring contrib and non-free Debian repositories in /etc/apt/sources.list.d In keeping with the evolutionary nature of the "unstable" Debian ... flexibility and reliability, built from the current debian unstable repository ...
Lintian
... is a helper tool used in conjunction with dpkg, the Debian package management system ... It checks Debian software packages for common inconsistencies and errors. 16th 2012, the latest version complies to Debian standards version 3.9.3 ...
Debian - Reception
... Debian was ranked second only to Ubuntu (which is derived from Debian) for Most Used Linux Distribution for both personal and organizational use in a 2007 survey by SurveyMonkey.com ... Debian won the 2007 poll on Server Distribution of the Year by LinuxQuestions.org ... Both the Debian distribution and their web-site have won various awards from different organizations ...
List Of Live CDs - Linux-based - Debian-based
... These are directly based on Debian Debian Live – Official live CD version of Debian aptosid based on Debian unstable (Sid), installable Live CD, DVD BackTrack – A penetration testing toolkit ...