GZDoom is an advanced Doom source port sporting hardware acceleration
using modern OpenGL as well as many additional features not in the
original engine. It is a universal source port capable of running
Freedoom, Blasphemer and Zauberer.
GZDoom is a free engine. This means that the source code is available
to be studied, modified, and distributed. Most projects look for help
with testing, documentation, graphics, etc., as well.
Notes:
These are official PowerPC and unofficial Intel OS X Leopard+ ports of
the original source.
