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.
Magnific Popup is a responsive lightbox & dialog script with focus on performance and providing best experience for user with any device.
OpenResty is a web platform based on nginx which can run Lua scripts using its LuaJIT engine.
A modest JavaScript framework for the HTML you already have.
Umbraco is an open-source Microsoft ASP.NET based content management system.