Apache Traffic Server is an open-source caching and proxying server that serves as an HTTP/1.1 and HTTP/2 reverse proxy with caching capabilities, load balancing, request routing, SSL termination, and support for advanced HTTP features.
HTTP Strict Transport Security (HSTS) informs browsers that the site should only be accessed using HTTPS.
MediaWiki is a free and open-source wiki engine.
Open Graph is a protocol that is used to integrate any web page into the social graph.