Fightly is based on many other Open Source projects. We use Node.js server-side, and so many great modules for Node. We also use Crafty.js on the client-side to handle the display and events.
Fightly is not ready to use yet. We are currently developing it, and hope to release a first useable version as soon as posible. We also aim at creating a browser game, originally called Fightly, that will demonstrate the power of the Fightly Game Engine.