http://www.icculus.org/jumpnbump/
http://brainchilddesign.com/
https://web-beta.archive.org/web/20080223055443/http://jumpbump.mine.nu:80/
http://freshmeat.net/projects/jumpnbump/
http://gohanz.www7.50megs.com/jumpbump/
https://www.libsdl.org/
