Xnapper - Take beautiful screenshots instantly
PuTTY - Popular free terminal application. Mostly used as an SSH client.
TakeaScreen - Take & capture screenshots like a Pro!
MobaXterm - Enhanced terminal for Windows with X11 server, tabbed SSH client, network tools and much more
Shottr - Shottr is a free macOS screenshot app with scrolling screenshots, OCR, annotation and measurement instruments.
iTerm2 - A terminal emulator for macOS that does amazing things.