ZDoomGL

ZDoomGL is an OpenGL port of ZDoom, programmed by Timmie. Originally it was programmed by Michael 'Kokak' Ryssen, but once he got a job working at UbiSoft, development on the port slowed considerably (and eventually stopped).

Sometime after, Timmie picked up development, and rewrote the port from scratch to be up to date with the latest version(s) of ZDoom. The current version is considerably more stable and 'professional' than the original, and is well on the way to becoming one of the best OpenGL ports out there (if it isn't already).