Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.

Wren - Offset your carbon footprint by saving rainforests

ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...

Klima - Go carbon neutral

FastStone Capture - A powerful, lightweight, yet full-featured screen capture tool that allows you to easily capture...

Capture - A great free screen capture utility that allows you to capture either a window or the desktop and save it to either a file or the clipboard.