Onyx by Titanium - This website provides operating system utilities for macOS
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Clean Master - Some users swear by it, some call it a glorified snake oil that does more harm than good. That can be said about any snake oil, but what specific brand of snake oil can boast almost a billion downloads around the world?
LightShot - The fastest way to take a customizable screenshot.