Hey folks, I'm one of the co-founders of Clay.io, a platform for HTML5 games - with a focus on distribution and high level features for developers.
We primarily help with two things for developers:
In addition to our own marketplace, we also make it much easier to get your games on many other marketplaces with much less effort. Each marketplace has its own requirements (SSL for Facebook, manifest files for the Windows App Store, Chrome Web Store, Mozilla Marketplace) - all of which Clay.io takes care of for you. We'll even tell you which marketplace is performing best for your games. Documentation can be found here.
High Level Features
Our API makes it easy to implement tedious features of game development, leaving you more time to focus on the game itself. These include: