vmf topic
Plumber
A Blender addon for importing Source 1 engine maps, models, materials and textures. This addon makes it possible to import full CS:GO, TF2, CS:S or other Source 1 game maps into Blender.
VMF2OBJ
Convert source-engine VMF files into OBJ files with materials (including brushes, displacements, entities, and models)
Lambda
A custom Source Engine level editor written in Go
map-compiling-toolkit
Tools for map compiling in Source Engine, tailored for Garry's Mod (and metastruct, sorry)
sledge-formats
C# parsers and formats for Half-Life 1 and related engines.
corvid
Source Engine level converter for Call of Duty.
sourcecraft
an easy to use Minecraft to Source Engine Converter
plumber_core
A Rust library for converting Source Engine VMF maps into a generic 3D format.