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

DisplayFusion - DisplayFusion will make your multi-monitor life much easier.

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

Mizage Divvy - Divvy is an entirely new way of managing your workspace.

LightShot - The fastest way to take a customizable screenshot.

WindowGrid - Quickly and easily layout windows on a dynamic grid using just the mouse.