singlelogin.re still worked for me recently.

Source

https://devblogs.microsoft.com/cppblog/stdany-how-when-and-why/

You can give chisel a try. It tunnels all traffic over http/https, and the client can then create port forwards, just as with ssh, to access other services.

We have those on I2P already, see tracker2.postman.i2p for example.

You should not torrent over the tor network, but you can torrent over the I2P network. qBittorrent even has experimental I2P support built in.