DebianSoftware -
http://wiki.debian.org/DebianSoftware
Quote:
New Debian users should obtain all their software from the Debian repositories. The Debian maintainers have gone to a lot of work to ensure that the software in the Debian repositories works well together and is secure. Getting software from non-Debian sources voids the (non-existent) warranty! The combination of package management systems and the advent Linux distributions which supply vast amounts of software fundamentally changes
...