Hugo is an open-source static site generator written in Go.
JSDelivr is a free public CDN for open-source projects. It can serve web files directly from the npm registry and GitHub repositories without any configuration.
Nginx is a web server that can also be used as a reverse proxy, load balancer, mail proxy and HTTP cache.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Twitter Emoji is a set of open-source emoticons and emojis for Twitter, TweetDeck, and also for Android and iOS versions of the application.