PuTTY - Popular free terminal application. Mostly used as an 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.
ConEmu - ConEmu-Maximus5 is a full-featured local terminal for Windows devs, admins and users. Get better console window with tabs, splits, Quake style, copy+paste, DosBox and PuTTY integration, and much more.
Terminator - Terminator is one of the most useful and dynamic terminal emulators for Unix based operating systems.
iTerm2 - A terminal emulator for macOS that does amazing things.
OpenSSH - OpenSSH is a free version of the SSH connectivity tools that technical users rely on.