Language Tutorials

C#

Tutorials Point – Good overall C# tutorial

Cross Platform Games Development

Marmalade – C++ based framework with easy deployment to all platforms. Free basic version with paid plans.

Haxe – Language that compiles to many different platform targets, including JavaScript, iOS, Android, PHP, C++. Opensource, totally free.

• Basis for cross platform UI development
• OpenFL for cross platform games development

Cross Platform App Development

Xamarin – C# based cross platform

Cordova – Apache foundation project for HTML5 xdev

• Intel in-app purchases for Cordova

PhoneGap – Based on Cordova

Other Tools for App Development

List of tools

Another list of tools