Kerlmax Sharpshooter - Rename, move, print, and even trash your Mac OS X screenshots as you take them.
LunaPic - Free and Easy to use online image effects. Try the effect.
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
FotoFlexer - FotoFlexer is the most powerful online photo editor in existence.
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Photoshop.com - Photoshop.