Tunna is a set of tools which will wrap and tunnel any TCP communication over HTTP. It can be used to bypass network restrictions in fully firewalled environments.
A proof of concept DNS-Over-HTTPS proxy implementing https://datatracker.ietf.org/doc/draft-ietf-doh-dns-over-https/
HTTP/HTTPS proxy in a single python script
TCP tunneling over HTTP/HTTPS for web application servers
A Simple HTTP Proxy like Python's SimpleHTTPServer module.