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 8,708,953 websites that are lodash Customers. We know of 2,917,868 live websites using lodash and an additional 5,791,085 sites that used lodash historically and 1,642,828 websites in the United States.
Get a list of 8,708,953 websites using lodash which includes location information, hosting data, contact details, 2,917,868 currently live websites and an additional 3,178,289 domains that redirect to sites in this list. 5,791,085 sites that used this technology previously and 1,642,828 websites in the United States currently using lodash.