The App Brewery - Turn your app idea into reality.
Udemy - Online Courses - Learn Anything, On Your Schedule
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.
Khan Academy - Khan Academy offers online tools to help students learn about a variety of important school subjects. Tools include videos, practice exercises, and materials for instructors. Read more about Khan Academy.
Appyet - Create stunning Android apps.
Coursera - Build skills with courses, certificates, and degrees online from world-class universities and companies