Prototype is a javascript framework which aims to ease development of dynamic web applications.
http://www.prototypejs.org
JavaScript Libraries and Functions · JavaScript Library
Get access to data on 2,602,094 websites that are Prototype Customers. We know of 726,752 live websites using Prototype and an additional 1,875,342 sites that used Prototype historically and 265,582 websites in the United States.
Get a list of 2,602,094 websites using Prototype which includes location information, hosting data, contact details, 726,752 currently live websites and an additional 681,141 domains that redirect to sites in this list. 1,875,342 sites that used this technology previously and 265,582 websites in the United States currently using Prototype.