ValveResourceFormat 

Library to parse and write Valve KeyValue formats

Fully fledged library to work with Valve's Pak (VPK) archives

Implements Valve's Datamodel Exchange (DMX) file format.

Parser, decompiler, and exporter for Valve's Source 2 resource file formats. Supports models, textures, materials, maps, particles, and more.

OpenGL-based rendering engine for Source 2 game assets. Supports models, maps, materials, particles, and animations with PBR lighting.

Source generator for reflection-based Element deserialisation in Datamodel.NET (KeyValues2).