Following Apple's release of iOS 7.1 on Monday, the company updated Xcode, its integrated development environment (IDE) for developers working on Mac and iOS applications. The new version, 5.1, is ready for download from the Mac App Store.
New to this release is an Auto Layout constraint inspector with support for all constraint types, Quick Look support in the debugger for custom object types, improved ability to resolve symbols in instruments, updates to the iOS standard architecture setting to include 64-bit, and other bug fixes and stability improvements.
Apple has also updated its command line developer tools for OS X Mavericks (to 126.96.36.199). That's been posted as a separate update, also available for download through the Mac App Store.
Both downloads are free for registered developers.
Free (with Apple developer license) - Download now