Auto Signature
* Auto Signature - Free marketing, random famous quote or funny joke tool for Outlook Express* Data Plus Auto Signature is a free software tool that gives extra functionality to your mailing program by adding jokes, quotations or html marketing text on a random basis to an email signature file. ... Advertising your product list on a random basis to your mail recipients as part of your internet marketing initiative. ... The software was designed for, set up and tested on Microsoft Outlook Express, but may work on other email clients able to attach an external signature file to it's outgoing...
http://www.dataplus.co.za/downloads/asSetup21.exe - 4Mb - Download - Screenshot

Quotator
Your email signature, evolved. Quotator is a quote rotator: Create and maintain a collection of quotes: favourite aphorisms, advertising messages or other snippets of wisdom. Automatically append a randomly selected quote from your collection to each of your outgoing email messages.
http://www.quotator.net/res/s,pad/quotator_trial_en.exe - 710Kb - Download - Screenshot

Instan-t
Instan-t is a powerful instant messaging software that allows you to communicate with MSN, AOL, Yahoo! , ICQ and Instan-t IM networks. Some Instan-t unique features are: - Voice chat: communicate face to face with contacts on any IM network and see their facial expressions. ... - E-mail signature tool: add a customized signature to all your e-mails to show your online/offline status. ... In addition, Instan-t has no advertising and contains no spyware. ... With a click on that signature tool, your friends can start chatting with you through your Web-Communication Center without downloading...
http://inidownload.com/it/Download/Completo/ITsetup.exe - 6Mb - Download - Screenshot

OutlookDisclaimer
Purpose: OutlookDisclaimer is a tool to automatically format and brand outgoing email. You don't need Exchange or any other mail server to add the disclaimer because it is a client-based tool. This means that you actualy see what you send out. This is not the case with server-based tools. ... This way you make sure that everyone uses the same centraly stored disclaimer, Company Logo, signature and layout for every e-mail they send. ... You can even run advertising campaigns or advertise your upcoming events with links that point to your webserver in every email that (some or all) users...
http://www.opusflow.nl/OutlookInside/Personal%20Disclaimer.exe - 2Mb - Download - Screenshot