Dead Pixel Buddy - web app tool to detect dead pixels on lcds plasmas tvs
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Dead Pixel Locator - Locate dead pixels or lit pixels on your LCD monitor or plasma displays, TVs.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
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LightShot - The fastest way to take a customizable screenshot.