Nem's Tools
GCFScape
FreePowerful archive extractor for Valve packages
Windows
MAP Viewer
FreeMAP Viewer: Fast 3D .MAP File Previews
WindowsCrafty
FreeCrafty: A Versatile Utility for Windows Users
Windows
VTFLib
FreeComprehensive Overview of VTFLib for Windows
WindowsBatch Compiler
FreeBatch Compiler: Streamline Your Map Compilation
WindowsTerrain Generator
FreeNem's Mega 3D Terrain: Ultimate Control for Game Developers
Windows