ColEm is one of the best emulator of the ColecoVision videogame system written by Marat Fayzullin. It's running on FreeBSD, HP-UX, SunOS, Solaris, Linux, and other Unix systems. GP2X-Colem is a port to GP2X of Colem Unix version 1.0. Read more about GP2X-Colem v1.0.1 (Coleco Vision emu for GP2x)