iSpy - iSpy is software that allows the user to view and control video surveillance cameras. The software began development in 2007 and now has over 2 million users around the world, according to the software's website. Read more about iSpy.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
motionEyeOS - A Video Surveillance OS For Single-board Computers
Shutter - Shutter is a feature-rich screenshot program.
Securityspy - SecuritySpy is a multi-camera video surveillance application for the Macintosh.
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