Witch - Welcome to the world of W. i. t. c. h.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
Contexts - Switch between application windows effortlessly — with Fast Search, a better Command-Tab, a Sidebar or even a quick gesture. Free trial available.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Hyperswitch - HyperSwitch provides a compelling alternative to HyperDock for keyboard junkies. What's New
iTerm2 - A terminal emulator for macOS that does amazing things.