MacRuby sounds very cool (via Jens Alfke):
In MacRuby, all Ruby classes and objects are actually Objective-C classes and objects. There is no need to create costly proxies, convert objects and cache instances. A Ruby object can be toll-free casted at the C level as an Objective-C object, and the Ruby VM can also handle Objective-C objects without conversion.
I hope this can be done for Python, too.
“Tweak it afterwards” makes it sound lightweight. It’s not. In other screen recording software, such as Snapz Pro X, you define a region of the screen to be recorded and if a dialog pops up somewhere you didn’t expect, you start all over again. ScreenFlow does away with all that: you record the entire screen, and zoom in or crop the video later. That alone justifies the application for me. You can also add highlights such as cursor circles, click targets and sounds and keystroke overlays—all automatically and all after the fact.
