For my 70-480 certificate I started a learning group a few years ago and following links have been ridiculous impressive to us – better don’t visit them! 😀
WebGL
Chrome Experiments: Rome – use mouse (not touch), wait till the end, fly around and enjoy. Will you find the heart too?
ROME has even a build tool.
Canvas
21 Ridiculously Impressive HTML5 Canvas Experiments
Chrome Experiments: The Cloth Simulation
Mr Speaker presents: Parcycle. A HTML5 Canvas Particle System
Mixed Technologies