The CoD4 Modding tools for making maps and modding Call of Duty 4 have been released! Here are download links and information:
CoD4 Mod Tools require your video drivers and DirectX to be up to
date. It will not work on Windows Vista, though some people have
reported some success running them in Windows XP Compatibility Mode.
The current COD4 Mod Tools are only currently supported for the English
version of the game, but other languages will be supported soon.
The tools require a DirectX 9 Shader Model 3.0 compliant card and the
.NET Framework Version 2.0 or higher, available from Windows Update or Click Here
Download the CoD4 Modding Tools. 500mb +