Impact
Impact has all the earmarks of a disruptive platform. It's an amazing game development platform written by Dominic Szablewski that is well documented, relies heavily on convention, is easy to get started with, and is simply beautifully written Javascript. The $99 license is worth it just so you can read through some of the best Javascript code you're likely to see.
Plugins
I've been an Impact developer since its debut, and have contributed to the growing community code base by writing a few plugins.
Impsock
Impsock is a Socket.IO plugin for Impact. In short, it allows a developer to very easily add realtime multiplayer support to their Impact games. It's very responsive.
IsometricMap
Still a work in progress IsometricMap brings the ability to use isometric views (much like those in my other project axono.me) in Impact.
Impact+Processing
There's no reason why the Javascript port of Processing shouldn't play nice with Impact right?
Actually, there a few reasons: the Processing.js code base is complicated. I'm still teasing apart how and when it draws to the canvas. Once I've figured that I'll have a much better demo here.
Once that happens though it means that I can use some of the amazing visual effects capabilities of Processing within Impact. Things like flocking, where your player can cast spells that swarm to your enemy like a flock of birds. Or simple weather simulations.
Games
More to come...