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 5,911,137 websites that are lodash Customers. We know of 1,324,253 live websites using lodash and an additional 4,586,884 sites that used lodash historically and 839,980 websites in the United States.
Get a list of 5,911,137 websites using lodash which includes location information, hosting data, contact details, 1,721,301 currently live websites which includes 397,048 domains that redirect to sites in the list. 4,586,884 sites that used this technology previously and 839,980 websites in the United States currently using lodash.