

Cynbe ru Taren (Jeff Prothero)
Core algorithm, original (pre 1.0) version: http://cynbe.us/~cynbe/gcoder/

Patrick Birnzain
sourceforge project, most of C++ rewrite

Christian M. Amsüss (Metalab Vienna)
Debian/Ubuntu Packages, major contributions

Bernhard Kubicek (Metalab Vienna)
--metric, --milldrill, path simplification, etc.

Pierre Doucet
Arch Linux packages


Further Development:
Andrew Jessop
Alan Condit
jmcgee
Christoper Gabriel
