F-Script

If you're looking for a lightweight open-source scripting layer that provides scripting and interactive access to Cocoa frameworks and custom Objective-C objects, F-Script could be the solution for you. Specifically designed for the Mac OS X object system, F-Script aims to be a useful and fun tool for both beginners and experts.

Based on Smalltalk, F-Script provides a pure object-oriented environment that leverages Mac OS X technologies and includes significant innovations, such as a high-level model for object manipulation and the most terrific object browser on earth! Unlike other scripting layers, F-Script doesn't use a bridging or binding technology between an existing object model and Cocoa. Instead, it has been developed from scratch for the Objective-C object model, making it highly integrated with Cocoa and optimized for native access.

Thanks to its versatility, F-Script has plenty of applications in various fields, including astrophysics, biology, music analysis, game development, software debugging, and artificial intelligence. As a stand-alone application, it dynamically loads your Objective-C classes, enabling you to access them interactively or using scripts. And with a set of components, F-Script can also be easily embedded into your own applications - just take a look at Colloquy, an advanced IRC & SILC client, ObjectiveCLIPS, a powerful rule-based development environment for Cocoa, and LSQL, an interactive tool for Sybase Adaptive Server, for excellent examples of this.

All in all, if you're looking for a powerful, versatile scripting tool that's optimized for native access and highly integrated with Cocoa, F-Script is definitely worth considering.