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 6,318,617 websites that are lodash Customers. We know of 833,712 live websites using lodash and an additional 5,484,905 sites that used lodash historically and 540,700 websites in the United States.
Get a list of 6,318,617 websites using lodash which includes location information, hosting data, contact details, 833,712 currently live websites and an additional 670,916 domains that redirect to sites in this list. 5,484,905 sites that used this technology previously and 540,700 websites in the United States currently using lodash.