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.
http://mootools.net/
JavaScript Libraries and Functions · JavaScript Library
Get access to data on 4,390,181 websites that are MooTools Customers. We know of 1,234,078 live websites using MooTools and an additional 3,156,103 sites that used MooTools historically and 384,122 websites in the United States.
Get a list of 4,390,181 websites using MooTools which includes location information, hosting data, contact details, 1,234,078 currently live websites and an additional 548,404 domains that redirect to sites in this list. 3,156,103 sites that used this technology previously and 384,122 websites in the United States currently using MooTools.