My website could not exist without these components:
GitHub Pages are public web pages for users, organizations, and repositories, that are freely hosted on GitHub’s github.io domain or on a custom domain name of your choice. GitHub Pages are powered by Jekyll behind the scenes, so they’re a great way to host your Jekyll-powered website for free.
Cloudflare provides a content delivery network, DDoS mitigation, Internet security services and distributed domain name server services, sitting between the visitor and the Cloudflare user's hosting provider, acting as a reverse proxy for websites.
Ivan wrote about comments hosted by GitHub back in 2011. I immediately thought that this was better than Disqus and with some tweaks I applied this to my blog.