Decentraland has released an alpha version of their sdk, people have already started to do all sort of cool stuff 
See: https://twitter.com/search?q=Decentraland&s=09
Hi. this is awesome. I'm in. Where's the main place to discuss / join development of Green point?See: https://twitter.com/search?q=Decentraland&s=09
Quote
Presenting the Decentraland SDK Alpha: Start building the metaverse using the first release of our API, updated CLI, and docs.