PuTTY - Popular free terminal application. Mostly used as an SSH client.
Termius - Powerful iOS, Android, Desktop (Chrome) SSH client
MobaXterm - MobaXterm is a software that uses a set of optimized network tools included in a single exe file. MobaXterm integrates several network clients with an X server, and also integrates a full set of Unix based commands. Read more about MobaXterm.
Tunnel Manager - Tunnel Manager allows users to easily manage a configurable list of SSH tunnels and their required...
Core Tunnel - Core Tunnel is the best way to manage your SSH tunnels, with OS X Keychain integration.
Sidestep - Sidestep sits quietly in the background, protecting your security and privacy as you browse the web.