Xnapper - Take beautiful screenshots instantly
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
TakeaScreen - Take & capture screenshots like a Pro!
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Sling - Sling is a free shift scheduling and communication software. It is built around four main features - shifts, messages, newsfeed and tasks, making it possible for managers to organize all aspects of their work on a single platform.
LightShot - The fastest way to take a customizable screenshot.