keroKero is a Source Engine game engine client implementation written in Go.
uSourceuSource is a plugin for importing MDL / BSP / VMT / VTF and etc... resources to Unity!
sledge-formatsC# parsers and formats for Half-Life 1 and related engines.
LambdaA custom Source Engine level editor written in Go
bspGo package for parsing Valve's Source Engine .bsp (Binary Space Partition) map files