Glitch Developers Site
Glitch is a great browser-based 2D platformer MMO I've been watching closely, and playing in both alpha and beta as time has allowed. One of the things I like about Glitch's approach is to blend MMO gameplay with things that I love about the web. For example, there is a web resource (URL) for every object in the game. Now Glitch takes it a step further by publishing an API and a full developer site with iOS and Android SDKs. This is an MMO inviting mashups of its game. Pretty cool stuff. Actually makes me want to play the game even more.
