FLEX - An in-app debugging and exploration tool for iOS.
Chrome Mobile DevTools - Mobile Debugging Tools
Bugfender - Cloud logging for your apps, not only crashes matter
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.
Flipboard FLEX - At Flipboard, we place a high value on tools that speed up and improve the development process.
Looker - Looker makes it easy for analysts to create and curate custom data experiences—so everyone in the business can explore the data that matters to them, in the context that makes it truly meaningful.