MooTools is a compact, modular, Object-Oriented JavaScript framework designed for the intermediate to advanced JavaScript developer. It allows you to write powerful, flexible, and cross-browser code with its elegant, well documented, and coherent API.
MooTools code respects strict standards and doesn’t throw any warnings. It’s extensively documented and has meaningful variable names: a joy to browse and a snap to understand.
Every web developer may select from components and build its own MooTools Core. Similarly, creation of selected plugins package can be done thru the MooTools More builder. Any download can be compressed if desired.
MooTools are very good documented, descriptions are short and clear, navigation thru the references is intuitive and fast.