Websites that have a shopping cart or checkout page, either using a known ecommerce platform or a custom solution.
cdnjs is a free distributed JS library delivery service.
Etix is an international web-based ticketing service provider for the entertainment, travel, and sports industries.
Modernizr is a JavaScript library that detects the features available in a user's browser.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Simpli.fi is a programmatic advertising and agency management software.
Varnish is a reverse caching proxy.