iamcal.com Since May 2000

Halfblock is a very neat sort-of-minecraft-clone written in JavaScript using WebGL. The source code is unfortunately on bitbucket instead of github, but cloning it shouldn't be too hard.

Andrew Godwin has just released an excellent mapping project, visualizing a few London Underground stations, complete with public corridors, escalators, spiral staircases and platforms. The maps are 3D models, which you can pan and zoom inside the browser. Digging into the source is also worth a look, since it uses some nice canvas and three.js guts.

Poking around his other work, the Twin Tubes map is also worth a look - the underground network with each individual track visualized.

convergence has some lovely gameplay

the dev video for biolab disaster is really good. lots of great ideas in there

canvasmol visualizes molecules using canvas. the future is sexy. and rotating in 3d

the best thing about dive in html5 is how great it looks in FF 3.5. and probably other browsers