Add Text Notes To Your Email Messages in Thunderbird
XNote is a Thunderbird extension that lets you associate sticky notes to emails. You can put anything text inside the note and it stays with your message forever.
thunderbird
Create an HTML Email Signature to Showcase Your Web Presence
Create a HTML Email Signaure for Microsoft Outlook and Outlook Express with links to your YouTube, LinkedIn, Flickr, MySpace, Facebook and other social profiles. Can also be used with GMail, Yahoo! or Windows Live Hotmail with some hacks.