software

http://code.google.com/p/gdipp/ gdipp reimplements the Windows text renderer to give it Mac-like anti-aliasing.

http://www.debian-administration.org/article/Recovering_deleted_images_from_flash_cards Photorec can help you recover deleted or damaged photos off a digital camera memory card.

http://gobby.0x539.de/trac/ Gobby is a cross-platform multi-user collaborative text editor.

http://code.google.com/p/tircd/ tircd lets you use Twitter by pushing tweets through a local irc server.

http://www.muppetlabs.com/~breadbox/software/tiny/teensy.html A really informative guide about creating really small ELF binaries.

http://osxbook.com/software/ancientfs/ Mount ancient UNIX filesystems on MacOS X!

http://mysqlgame.com/ SQL queries the video game.

http://algebraicthunk.net/~dburrows/blog/entry/package-management-sudoku/ Solving Sudoku with the apt package manager.

http://www.bluem.net/en/mac/pashua/ Pashua is a simple way to create native MacOS X GUIs for various languages.

http://www.newsbeuter.org/index.html Newsbeuter is a command-line RSS feed reader.