kama
A simple yet extensible Java JSON transformation framework based on Codehaus Jackson
It was originally written as a tool to transform/aggregate RESTful API JSON data from one eCommerce engine. The eCommerce site now bypasses the engine's own php based templates system and renders the data using EmberJS and Handlebars templating system, giving greater UI design control to the designer.
As of March 2014, the development is on hold for major lifestyle changes :)
The plan is to start to thoroughly document the existing code and add JUnit tests (I can feel TDD chaps cringe), in April 2014.