htop - htop - an interactive process viewer for Unix. This is htop, an interactive process viewer for Unix systems. It is a text-mode application (for console or X terminals) and requires ncurses. Latest release: htop 2.
PuTTY - Popular free terminal application. Mostly used as an SSH client.
Windows Task Manager - Need assistance with your Microsoft product? Find helpful articles for Windows, Office, Microsoft Account, Microsoft Store, Xbox, and more.
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
glances system monitoring - Glances is a cross-platform system monitoring tool written in Python. Written in Python, Glances will run on almost any plaftorm : GNU/Linux, FreeBSD, OS X and Windows.
iTerm2 - A terminal emulator for macOS that does amazing things.