This is some stuff that I know it's difficult to find elsewhere...
Mark Enlow's original Quake Utilities:
Arena, a rather wonderful little utility that creates DM arenas randomly!
Visage, the skin and pak utility, not compatible with OS9 (use DePacker instead).
QBSP VIS and LIGHT (ported from the Id originals)
RVIS, a better version of VIS, copes with transparancy effects.
A different LIGHT utility, ported by Phaedrus which includes Quiver definitions.
Quake C Compiler, you need this to alter Quake's behaviour.
Quake C Reference Manual, an excellent guide to Quake C.
Patches maps to include transparancy and mirror effects.
Essential file for Id's maps to use with MacVisPatch.
Giles Williams ©1999