Kony - Kony is a mobile application application development platform that facilitates companies to deliver innovative mobile solutions.
Xamarin - Create iOS, Android and Mac apps in C#
GeneXus - Web & Mobile application development platform
Usablenet - Usablenet is a mobile and multi-channel technology solution.
Appcelerator - Native apps, Mobile APIs, Real-time analytics, One Platform.
RubyMotion - Write cross-platform native apps in Ruby