I'm using LibGDX for writing games (although you could of course write other apps). They have fairly recently added RoboVM support for compiling to ios and it's

I'm using LibGDX for writing games (although you could of course write other apps). They have fairly recently added RoboVM support for compiling to ios and it's amazing. I literally loaded up my code in Eclipse on a Mac, right-clicked and ran, and there way my game, running on the iphone emulator... Pretty impressive, especially for free.