Lo-dash is an alternative and a drop-in replacement for Underscore.js.
http://lodash.com/
JavaScript Libraries and Functions · JavaScript Library
Get access to data on 6,558,790 websites that are lodash Customers. We know of 1,427,423 live websites using lodash and an additional 5,131,367 sites that used lodash historically and 970,763 websites in the United States.
Get a list of 6,558,790 websites using lodash which includes location information, hosting data, contact details, 1,427,423 currently live websites and an additional 1,221,444 domains that redirect to sites in this list. 5,131,367 sites that used this technology previously and 970,763 websites in the United States currently using lodash.