glTF

1. glTF 2.0 specification

   Scenes, nodes, meshes, materials and animations.

2. glTF overview

   Khronos overview of glTF as the transmission format for 3D assets.

3. glTF tutorial

   Tutorial on glTF scenes, nodes, meshes, accessors, materials and animations.

4. Extensions

   KHR_ and vendor extensions such as KHR_materials_pbrSpecularGlossiness and KHR_draco_mesh_compression.

5. glTF Validator

   Tool for validating glTF and GLB assets against the spec.

6. Sample assets

   Reference models for testing glTF viewers and importers.

7. KTX 2.0

   KTX 2.0 container for GPU textures with Basis Universal supercompression.

Each section links to the official page. Titles and summaries by Extra Credit; the docs belong to their authors.