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

CodeSignal - CodeSignal is the leading assessment platform for technical hiring.

Shutter - Shutter is a feature-rich screenshot program.

Codejudge - Automate tech hiring with simulated real world assessments

Snipping Tool - Use Snipping Tool to capture a screen shot, or snip, of any object on your screen, and then annotate, save, or share the image

HackerRank - HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.