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 6,202,676 websites that are lodash Customers. We know of 1,487,258 live websites using lodash and an additional 4,715,418 sites that used lodash historically and 915,258 websites in the United States.
Get a list of 6,202,676 websites using lodash which includes location information, hosting data, contact details, 2,271,033 currently live websites which includes 783,775 domains that redirect to sites in the list. 4,715,418 sites that used this technology previously and 915,258 websites in the United States currently using lodash.