Chosen is a jQuery plugin that makes long, unwieldy select boxes much more user-friendly.
ClustrMaps widget is a visitor tracker, designed for general web and blog use.
D3.js is a JavaScript library for producing dynamic, interactive data visualisations in web browsers.
Django is a Python-based free and open-source web application framework.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
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.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.