WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.
Grytics - Grytics is a SaaS solution for your Facebook Groups Analytics and Marketing
MySignature - MySignature is FREE Email Signature Generator that helps to create Professional Signatures for major email clients such as Outlook, Gmail...
SignWell - Make it so easy to sign your documents that it cuts turnaround time in half.
Sigstr - Email signature marketing
MySigMail - UI email signature generator on GitHub