[ghh]

Fabrice Bellard [1,2] should be on this list. Author of QEMU and FFMPEG among other open source projects that have been useful to a lot of people. Also, author of jslinux [3].

[1] http://bellard.org/

[2] http://en.wikipedia.org/wiki/Fabrice_Bellard

[3] http://bellard.org/jslinux/