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 4,253,115 websites that are MooTools Customers. We know of 1,074,148 live websites using MooTools and an additional 3,178,967 sites that used MooTools historically and 294,881 websites in the United States.
Get a list of 4,253,115 websites using MooTools which includes location information, hosting data, contact details, 1,074,148 currently live websites and an additional 483,170 domains that redirect to sites in this list. 3,178,967 sites that used this technology previously and 294,881 websites in the United States currently using MooTools.