there are plenty of unusable iOS simulators and/or emulators, but to truly get the iOS\'s feel of old app.io, you'll need the iPhone simulator on BSD, and luckily there is an one opensource project at twitter: https://x.com/ToadstoolsBSD . They were pioneer's of FreeBSD/ARM as Inferno POSIX, sending base64 string over WebSockets and using CGEventPostToPSN, more information here: https://developer.apple.com/library/mac/documentation/Carbon/Reference/QuartzEventServicesRef/index.html#//apple_ref/c/func/CGEventPostToPSN . You can easily implement this tool on FreeBSD as well any Linux Distro on your own. To develop .IPA there, they are using Gnat-Aux with GCC and somehow cross-compile Java to Obj-C, or what the hell that works?! If you'll search deep into, perhaps iDempiere is using toadstools for its official mobile app.

Best regards