WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.

Greenshot - Greenshot is a free and open source screenshot tool that allows annotation and highlighting using the built-in image editor.

MySignature - MySignature is FREE Email Signature Generator that helps to create Professional Signatures for major email clients such as Outlook, Gmail...

Shutter - Shutter is a feature-rich screenshot program.

Sigstr - Email signature marketing

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