F-Script

F-Script is an award winning set of open source tools that complement Xcode and Interface Builder to provide scripting and interactive access to Cocoa frameworks and custom Objective-C objects. It aims to be a useful and fun tool for both beginners and experts, allowing interactively exploring, testing, and using Cocoa-based objects and frameworks. F-Script can be embedded in application thanks to a set of easy to use components. It can also be dynamically injected into any Cocoa application, providing a powerful environment for exploring or manipulating applications from the inside.