Game Development Tools

Unity (unity3d.com)

Construct 2 (www.scirra.com)

GameMaker Studio (www.yoyogames.com)

Marmalade (www.madewithmarmalade.com)

MonoGame (www.monogame.net)

Photon Cloud (www.exitgames.com)

PhoneGap (Apache Cordova) (phonegap.com)

Cocos2dx (www.cocos2d-x.org)