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

DataMask.tech - Mask private data before taking screenshots

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

Image Blur - Hide your sensitive data with a click

LightShot - The fastest way to take a customizable screenshot.

GitGuardian - Detect secrets in source code, public and private!