IBM Worklight - Mobile application platform. Eclipse-based and presumably Java-infested in a typical IBM fashion, but still perhaps worth a look: an IDE for mobile applications that a) includes both client and server and b) supports multiple target systems (iOS, Android, web applications). So basically something like Titanium Appcelerator or Phonegap, but with server infrastructure and management tools included. And you can choose how portable you want to be and integrate native extensions if you need them (and of course sacrifice parts of portability in the process).