Xamarin - Create iOS, Android and Mac apps in C#
GoodBarber - GoodBarber is a mobile app creation platform.
Xcode - Xcode is Apple’s powerful integrated development environment for creating great apps for Mac, iPhone, and iPad. Xcode 4 includes the Xcode IDE, instruments, iOS Simulator, and the latest Mac OS X and iOS SDKs.
Dropsource - Mobile development platform for building native iOS & Android apps
FEELingK - FLK wireless internet messaging solutions.
Bizness Apps - Create your own app or become a reseller and build apps for others