www.sourceforge.net SourceForge is used for hosting many popular games and programs
www.libsdl.org Simple DirectMedia Layer is a nice grahpics library used by Loki games
www.xiph.org/ogg/vorbis OGG is an open-source alternative to MP3
Other sites of our liking...
www.unl.edu/hlug Home of the Husker Linux Users Group
aztec.sourceforge.net Aztec 3D Modeller may soon be used by us!