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 2,717,241 websites that are Prototype Customers. We know of 875,727 live websites using Prototype and an additional 1,841,514 sites that used Prototype historically and 326,425 websites in the United States.
Get a list of 2,717,241 websites using Prototype which includes location information, hosting data, contact details, 1,803,143 currently live websites which includes 927,416 domains that redirect to sites in the list. 1,841,514 sites that used this technology previously and 326,425 websites in the United States currently using Prototype.