[List of freemium port-forwarding services](
https://gist.github.com/SomajitDey/efd8f449a349bcd918c120f37e67ac00)
Useful for accessing a computer that does not have a public IP address, over the internet. The machine can be behind multiple firewalls and NATs.
Self-hosted: https://github.com/antoniomika/sish
Keywords: public localhost; reverse ssh service; expose localhost; tunnelling; https/tcp/udp/ssh port forwarding