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 6,867,122 websites that are lodash Customers. We know of 1,396,416 live websites using lodash and an additional 5,470,706 sites that used lodash historically and 953,914 websites in the United States.
Get a list of 6,867,122 websites using lodash which includes location information, hosting data, contact details, 1,396,416 currently live websites and an additional 1,270,786 domains that redirect to sites in this list. 5,470,706 sites that used this technology previously and 953,914 websites in the United States currently using lodash.