A nice 3D game with penguins.

It uses Tcl at least for its track configuration files. (maybe for more)

http://tuxracer.sourceforge.net/

the ?founding persons? of tuxracer went commercial( now defunct ) http://www.sunspirestudios.com

the oss version was continued by PPRacer http://freshmeat.net/redir/ppracer/53520/url_homepage/racer

their first act of improvement was to rip out tcl ; pure vandalism!

someone has collected some info at: http://en.wikipedia.org/wiki/Tux_Racer

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