WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.
GMass - GMass allows you to easily schedule emails, send out mass emails and mail merge campaigns and more with Gmail! Click here to learn about more features!
NEWOLDSTAMP - Email signature generator
Elevatr Email Marketing Automation - Fast and easy email marketing software
Sigstr - Email signature marketing
Google Sheets Email Marketing - Email automation and validations directly from Google Sheets