What is "rightjs"

RightJS — is a compact JavaScript framework for developing cross-browser web-applications. RightJS based on extendable modular architecture. It has small (15k gzipped) core including many features such as DOM-manipulations, animations, forms, cookies, event processing(including non standard events), OOP implementations and others. RightJS is a direct descendant of Prototype library and analogue well-known JavaScript frameworks JQuery and Mootools.