One cool feature is that you can use C-Kermit to do inline file transfers over the open SSH session. It doesn't work over a terminal muxer like screen/tmux, but it is pretty useful for a quick way to transfer files between the client and the remote host.

The remote host just needs kermit or zmodem (sz/rz), since at least K95 supported zmodem also.

There are paid for SSH clients (SecureCRT) that has the feature with Zmodem. Nice to have it on free software.