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.
Lightbox is small javascript library used to overlay images on top of the current page.
LiteSpeed is a high-scalability web server.
Material Design Lite is a library of components for web developers.
OWL Carousel is an enabled jQuery plugin that lets you create responsive carousel sliders.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.