NEWOLDSTAMP - Email signature generator
WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.
Quicktext - Quicktext is an extension for Thunderbird that lets you create templates that can be easily inserted into your own emails.
Sigstr - Email signature marketing
HTMLSig - htmlsig.com makes it easy to generate email signatures without any HTML coding skills.
Exclaimer - Exclaimer is the industry's leading provider of email signature solutions, empowering businesses to unlock the potential of email as a key digital advertising channel.