Signatures - description from Softdepia.com:
Easily create your own Custom Email Signatures. Easy to use program lets you enter 4 lines including click able email address and web site URL. Choose fonts, font color and animated or static graphics of any format to send with every outgoing email. 30 unique free animated gifs included to get you started. Use different Signatures for Holidays, Events, Your Moods, etc.
Signatures is a "Free to try" program. You can download and try it for an evaluation period.