Mailmeteor - Send hundreds of personalized emails with Gmail.
WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.
Dynamically Personalized Emails by QGraph - Hyper-personalized emails for E-commerce
MySignature - MySignature is FREE Email Signature Generator that helps to create Professional Signatures for major email clients such as Outlook, Gmail...
Nova Inbox - Personalize emails in seconds, right from your inbox
Sigstr - Email signature marketing