Kerlmax Sharpshooter - Rename, move, print, and even trash your Mac OS X screenshots as you take them.
digiKam - Professional Photo Management with the Power of Open Source
Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
ShareX - ShareX is a free and open source program that lets you capture or record any area of your screen...
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.