Models, Skins, & Textures 

• Polycount
• Skindom
• PlanetQuake3.net
• Umustdie Quake3 Arena Skin Supply
• HFX
• ftp.cdrom.com/pub/quake2/graphics/md2
• ftp.cdrom.com/pub/quake/graphics/mdl

 Tools 

• ZipIt
• Meshwork
• MacCVS
• BBEdit

 Model Viewer Source Code 

• Java MD3 Model Viewer
• Md3View
• QView
• ModelLook
• Half-Life Model Viewer
• Loren Petrich's Model Viewers

 Programming Documentation 

• OpenGL Programming Guide
• OpenGL Reference
• Apple OpenGL Site
• SGI OpenGL Site
• QuickTime API Documentation
• Macintosh Programmers's Link Library
• MacOS Open Source Software
• Neon Helium Productions

 Quake Programming and Editing 

• macintosh map editor project
• MacGLQuake
• Aftershock
• Quake Engine Resources
• Quake III Arena Shader Manual
• Unofficial Quake Specs
• Quake Developer's Pages
• Quake 4 Dummies - FAQ