Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.
Nimbus Screenshot - Take screenshots and record video from your screen
Scup - Easily upload screenshot or files to FTP server and copy its URL address to clipboard.
FireShot - Capture web page screenshots in Firefox, Chrome, or IE, and then edit and save them.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Firefox Screenshots - Take, save & share screenshots without leaving Firefox