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.
Mobile-detect.js is a compact JavaScript library designed to detect devices by comparing patterns against a given User-Agent string.
Modernizr is a JavaScript library that detects the features available in a user's browser.
Polyfill is a service which accepts a request for a set of browser features and returns only the polyfills that are needed by the requesting browser.
Tengine is a web server which is based on the Nginx HTTP server.