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.
Fluid for Sketch - Sketch plugin to make your responsive designs more efficient
Angle 2 Mockups - A giant Sketch Library for creating app presentations
Git Sketch Plugin - Version control for designers
Balsamiq Mockups 3 - New public beta for the popular prototyping tool
Unsplasher - Fill shapes or symbols in Sketch with images from Unsplash 🖼