There is also something new called 'bitshares'. Something similar to mastercoin it seems, except it is a new cryptocurrency based off of RAM mining, so it's very different in that regard. It's an interesting project by Invictus Innovations, I've heard the interview from Let's Talk Bitcoin. They're trying to develop a decentralized anonymous internet and a decentralized securities market. It'll probably be a while though.
They had a presentation at the Atlanta Bitcoin Conference. It was extremely interesting and they are moving forward with it very quickly. It's great that all of these projects are underway. May the best one win!