Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
NinjaCapture - All in on Screen Capture
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Picosmos Tools - Picosmos Tools integrates picture browsing, editing, layout, frames, and cosmetic effects into one set. It also provides plenty of source material.
LightShot - The fastest way to take a customizable screenshot.
Snagit - Screen Capture Software for Windows and Mac