https://github.com/mrdoob/three.js/wiki
Introduction
Purpose of Wiki
API Documentation and Manual
Build Instructions
Migration Guide
Developer Guide
Developer's TODO list
Mr.doob's Code Style™
How to contribute to three.js
An introduction to using Git
Dev Branch Examples
How to use OpenGL or ANGLE rendering on Windows
Three.js JSON format schema
JSON Model format 3 (Soon to be deprecated)
JSON Geometry format 4
JSON Texture format 4
JSON Material format 4
JSON Object/Scene format 4
Developer Reference
Uniforms types
Articles
Using SketchUp Models