Apache is a free and open-source cross-platform web server software.
cdnjs is a free distributed JS library delivery service.
Google Analytics is a free web analytics service that tracks and reports website traffic.
jQuery is a JavaScript library which is a free, open-source software designed to simplify HTML DOM tree traversal and manipulation, as well as event handling, CSS animation, and Ajax.
Lever is a software company headquartered in San Francisco, California and Toronto, Canada that provides an applicant tracking system for hiring.
Open Graph is a protocol that is used to integrate any web page into the social graph.