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 4,477,486 websites that are MooTools Customers. We know of 1,302,511 live websites using MooTools and an additional 3,174,975 sites that used MooTools historically and 401,504 websites in the United States.
Get a list of 4,477,486 websites using MooTools which includes location information, hosting data, contact details, 1,302,511 currently live websites and an additional 383,092 domains that redirect to sites in this list. 3,174,975 sites that used this technology previously and 401,504 websites in the United States currently using MooTools.