Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
piZap - Free online photo editing software.
Snagit - Screen Capture Software for Windows and Mac
Photoshop.com - Photoshop.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Fun Photo Box - FunPhotoBox is a free photo editing device where you can make clever pictures from your photographs.