tmux - tmux is a terminal multiplexer: it enables a number of terminals (or windows), each running a...
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
GNU Screen - Screen is a full-screen window manager that multiplexes a physical terminal between several...
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
mtm - Perhaps the smallest useful terminal multiplexer in the world.
LightShot - The fastest way to take a customizable screenshot.