An interactive course from Code School that teaches the basics of the Objective-C language for iOS development beginners. You can subscribe to play more advanced iOS courses, but this course (and the first level of all courses) is free to play.
Instabug helps you collect feedback and bug reports from your users and testers by simply shaking their phones. Comprehensive reports are forwarded to Instabug’s dashboard including complete app data, device details, and most importantly, the reproduction steps. Integrate the SDK in less than a minute and get started for free.