The Internet is genuinely one of the best things to come out of 20th century. It has so many implications for the future and can solve so many of the world's problems, it is exciting.
Amazing thing about the web is the fact that clients (browsers) and servers can interact in complex ways without the client knowing anything beforehand about the server and the resources it hosts.
RealWorld - Exemplary fullstack Medium.com clone powered by React, Angular, Node, Django, and many more.
Internetting is hard - Friendly web development tutorials for complete beginners.
devd - Local webserver for developers.
Lwan Web Server - Experimental, scalable, high performance HTTP server.
NetData - System for distributed real-time performance and health monitoring.
Squoosh - Make images smaller using best-in-class codecs, right in the browser.
web.dev - Explore structured curriculums that include both guides and hands-on codelabs.