The Omni Group has a real nice-looking set of Cocoa frameworks that they make available under a relatively liberal license. In particular, OWF looks like it might be a perfect fit for some projects I’ve been thinking about. But the enormous complexity of the framework (there are 580 header files describing OWF and the other Omni frameworks it relies on) combined with a lack of documentation, means that it would probably take me longer to understand how to use the frameworks than it would to just write my own code to do the parts I need. This seems like a shame.