http://www.jumpbump.mine.nu/
http://www.icculus.org/jumpnbump/
http://freshmeat.net/projects/jumpnbump/
http://www.geocities.com/bkron2000
http://bloodybunnies.8m.com/
http://gohanz.www7.50megs.com/jumpbump/
http://brainchilddesign.com/games/jumpnbump/index.html
http://www.libsdl.org/