MySignature - MySignature is FREE Email Signature Generator that helps to create Professional Signatures for major email clients such as Outlook, Gmail...
Signature.email - A powerful visual drag and drop email signature generator paired with the easiest way to maintain consistency for your whole team.
WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.
MySigMail - UI email signature generator on GitHub
NEWOLDSTAMP - Email signature generator
Email Signature Rescue - Create, manage and deploy beautiful customized HTML signatures in any email client.