As a follow-up to the Mac Developer Roundtable Episode 007, Colin Wheeler explains on Cocoa Samurai how he uses F-Script:
I'm a huge fan of creating experimental projects and playing around with API's and that's one reason I'm a fan of F-Script because then I don't have 30 small projects cluttering up my desktop or a temp directory and so now I do much less tiny projects in Xcode and use F-Script to see how the API's work.
You can start F-Script up in a console and create an app from scratch or just create temp objects and see how they work and play around with Cocoa in a way that's not possible in Xcode without creating loads of small projects.
You can download F-Script from http://www.fscript.org though if you are on Leopard you will need to download and install a special version of FScript Anywhere from http://osiris.laya.com/blog/?p=24
You can learn more on this in "Exploring Cocoa with F-Script", an article that shows the graphical F-Script object browser and some other cool exploration tools in action.
