Cesium – An open-source JavaScript library for 3D globes and maps
Don't mean to hijack, but if you're interested in 3D globes (and 2D projections), NASA has been working on porting World Wind to Web:<p><a href="https://github.com/NASAWorldWind/WebWorldWind" rel="nofollow">https://github.com/NASAWorldWind/WebWorldWind</a><p>and<p><a href="http://webworldwind.org" rel="nofollow">http://webworldwind.org</a><p>The power of WebGL is awesome!