Cocoa (OS X) vs RichFaces: What are the differences?

Cocoa (OS X): The Cocoa frameworks consist of libraries, APIs, and runtimes that form the development layer for all of OS X. Much of Cocoa is implemented in Objective-C, an object-oriented language that is compiled to run at incredible speed, yet employs a truly dynamic runtime making it uniquely flexible. Because Objective-C is a superset of C, it is easy to mix C and even C++ into your Cocoa applications; RichFaces: The next-generation JSF component framework by JBoss. It is an advanced UI component framework for easily integrating Ajax capabilities into business applications using JSF.

Cocoa (OS X) and RichFaces can be primarily classified as "Frameworks (Full Stack)" tools.

RichFaces is an open source tool with 54 GitHub stars and 98 GitHub forks. Here's a link to RichFaces's open source repository on GitHub.