PuTTY - Popular free terminal application. Mostly used as an SSH client.
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.
KiTTY - KiTTY is a fork from version 0.70 of PuTTY. It adds extra features to PuTTY.
iTerm2 - A terminal emulator for macOS that does amazing things.
Alacritty - Alacritty is a blazing fast, GPU accelerated terminal emulator.