Great software

• Sylpheed - a very good Open Source eMail client for Linux/UNIX and MS Windows
• Mutt - an even better Open Source eMail client, though not for everyone, as it's command-line-only
• Opera - A very good, free Browser
• gentoo Linux - my former Linux distribution of choice
• Linux From Scratch - learn a lot about linux (and assemble your own operating system)
• Unclassified Newsboard - a great Open Source bulletin board
• Drupal - a CMS you will love to hack, thanks to its very clean design. Formerly used on this site.
• Python - a nice programming language.

Linux stuff

• Kernel.org
• Linux wireless - Linux WLAN information
• Linux IEEE 1394 / Firewire information
• Linux kernel newbies - site with information about the kernel
• LWN.net - Linux Weekly Newsletter

Other interesting sites

• dict.leo.org - huge German-English / English-German dictionary
• dict.cc - another dictionary
• www.urbandictionary.com - slang dictionary with definitions provided by its users
• The answer to life, the universe and everything

Related to me in one way or another

• bidde-bidde-board: Forum der Teilnehmer der Science Academy 2004 (both German)
• ABI-2008-Jahrgang des FAGs (also German)
• an empty domain
• another empty domain