Apple Xcode

Xcode provides everything developers need to create great applications for Mac, iPhone, and iPad. Xcode has unified user interface design, coding, testing, and debugging all within a single window.

The Xcode IDE analyzes the details of your project to identify mistakes in both syntax and logic, it can even help fix your code for you. Xcode includes the Xcode IDE, LLVM compiler, Instruments, iOS Simulator, the latest OS X and iOS SDKs, and hundreds of powerful features.
What's new in this version:
Improves stability and fixes an issue that could result in slow compile times for complex Swift projects.