Nez is an impressive web-based emulator originally written by Sumez. He has a Twitter too!
He wrote the code that makes this whole thing tick, and deserves full credit!
I forked this emulator to add a few new features, and to try to make it as friendly as possible for individual developers to create an emulator for their games. I added an easy way to auto-load games and an embed feature,
so if you want to set this up for yourself, it shouldn't be hard! Check it out on Github for instructions on setting it up.
My Twitter is open for feedback as well! @cppchriscpp