PuTTY - Popular free terminal application. Mostly used as an SSH client.
PAC Manager - PAC Manager
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Truck - A faster alternative to FTP
iTerm2 - A terminal emulator for macOS that does amazing things.
ShellCraft - ShellCraft is an ssh GUI for Unix.