Bootstrap is a free and open-source CSS framework directed at responsive, mobile-first front-end web development. It contains CSS and JavaScript-based design templates for typography, forms, buttons, navigation, and other interface components.
CacheFly is a content delivery network (CDN) which offers CDN service that relies solely on IP anycast for routing, rather than DNS based global load balancing.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.