GZDoom

GZDoom is a ZDoom based OpenGL port which is maintained by Graf Zahl. It was first released mid-2005.

Features

 * Full 3d floors
 * 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