Quake III SDK 201
Linux SDK offers Linux users a toolchain to create maps and game code modifications for Quake III: Arena.
It combines software for processing, converting and editing images with a full-featured map editor that's compatible with the Quake III engine.
The features include custom texturing, lighting, patches, shaders, entities and more. It is based, in part, on the QERadiant code from id Software, Inc.