I had mentioned SecureCRT, it is my daily use ssh client. But if we want to focus on more vintage software, my favorite terminal emulator is ProComm Plus, made by Datastorm. As it happens, the two original authors/owners wrote it while living in my area (university). I grew up using that one, and it is still installed on my move-around-rack-on-wheels system that provides services to other machines in the collection (PUTR, etc).
https://en.wikipedia.org/wiki/Datastorm_Technologies
