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 2,753,641 websites that are Prototype Customers. We know of 787,328 live websites using Prototype and an additional 1,966,313 sites that used Prototype historically and 274,253 websites in the United States.
Get a list of 2,753,641 websites using Prototype which includes location information, hosting data, contact details, 787,328 currently live websites and an additional 657,766 domains that redirect to sites in this list. 1,966,313 sites that used this technology previously and 274,253 websites in the United States currently using Prototype.