You might also encounter Bigfoot.js and Reveal.js scattered throughout this site. AnchorJS provides the GitHub-style deep anchor links (the clickable
# to the right of each heading). Staticman is the hero this city needs, unerringly providing a super method for comments.
Take a look here.
If you're looking to make a similar website for yourself, here's a great set of introductions & instructions to Jekyll & GitHub Pages.