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

DaisyDisk - DaisyDisk is a disk analyzer tool for OS X that visualizes hard disk usage and allows to free up hard disk space.

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

CleanMyMac X - Clean, protect and speed up your Mac

LightShot - The fastest way to take a customizable screenshot.

MacFly Pro - Smart assistant for better Mac performance