ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Awesome Screenshot - Capture the whole page or any portion, annotate it with rectangles, circles, arrows, lines and...
Shutter - Shutter is a feature-rich screenshot program.
BrowseShot - BrowseShot lets you capture a PNG of the full scrollable area of a website.
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