Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
LightShot - The fastest way to take a customizable screenshot.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Snagit - Screen Capture Software for Windows and Mac
Nimbus Screenshot - Take screenshots and record video from your screen
PicPick - PicPick screen capture software enable you to grab an image on your computer screen, save, print, add effects, and share.