Nimbus on GitHub | iPhone and iPad development | Scoop.it
Nimbus is an iOS framework whose feature set grows only as fast as its documentation.

By focusing on documentation first and features second, Nimbus hopes to be a framework that accelerates the development process of any application by being easy to use and simple to understand.

Nimbus has been built with much inspiration from the Three20 framework. That being said, there are a number of fundamental problems with Three20 that Nimbus works very hard to avoid

✔ Sources : https://github.com/jverkoey/nimbus