Nem's Tools
GCFScape
FreePowerful archive extractor for Valve packages
Windows
Crafty
FreeBrowse 3D objects, material, model and files.
WindowsBatch Compiler
FreeCompile all your maps easily.
WindowsMAP Viewer
FreeView .MAP files in different modes.
Windows
VTFLib
FreeHave a library for LGPL open source programming.
WindowsTerrain Generator
FreeGenerate terrain with complete 3D control.
Windows