Three.js
home of threejs. incudes original documentation.
Intro to WebGL
nice web tech based slide presentation about webgl. side effect shows integration between webgl, css tweening and html page.
Stemkoski's Examples
Exhaustive list of Three.js Examples. Like a Cookbook of sorts.
WebGL
Often a good place to start from is wikipedia
Three.js
Often a good place to start from is wikipedia
Javascript the Good Parts
The language has flaws, dont let them set traps for you.
Game Programming Patterns
Several of these are super useful for non games too.
Intermediary WebGl
Josh's tutorial is the inspiration for some of the later tutorials.
Dirkson, J. (2013) Learning Three.js: The JavaScript 3D Library for WebGL PACKT Birmingham UK
Dirkson, J. (2014) Three.js Essentials PACKT Birmingham UK
Dirkson, J. (2015) Three.js Cookbook PACKT Birmingham UK
Sukin, I. (2013) Game Development with Three.js PACKT Birmingham UK
Parisi, T. (2012) WebGL Up and Running O'Reilly