GhostCodes for Android - Discover the coolest accounts to follow on Snapchat 👻
VisualCode - QR codes for everything
QR Code Generator For Developers - A quick API to generate QR codes in your apps
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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.