TapkuLibrary is an open source iOS framework built on Cocoa and UIKit intended for broad use in applications. If you really like the framework, drop me a line, I'd love to hear about it. Many thanks to those who have contributed to the project.
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The best place to start is by downloading the source and trying out the demo app. The demo project gives a brief overview of the functionality of the framework. Instructions on adding the framework in your own project for XCode 3 & XCode 4 and documentation, can be found on the wiki.