GZDoom

GZDoom is a ZDoom based OpenGL port which is maintained by Graf Zahl. It was first released on the 30th August 2005. The current version can be found here.

Features

 * Full 3d floors (including slopes)
 * Inventory and weapon definitions via DECORATE
 * FraggleScript support (so Legacy/Eternity/SMMU maps are supported)
 * Global scripts via the FSGLOBAL lump
 * Reflective floors
 * Dynamic Lights
 * Unreal style skyboxes
 * Hi-Resoultion textures, defined like ZDoomGL
 * Eternity-style water warping
 * Ability to alter jump heigth in ACS