WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.
SendX.io - SendX (https://sendx.io) provides remarketing and retargeting tools for web businesses. You can use popups, landing pages, email, web push notification, automation workflows and FB / Google retargeting to drive more revenue.
Mailcastr - Create email signature that tells when your email is read.✉️
Nova Inbox - Personalize emails in seconds, right from your inbox
Email Signature Template Generator - Create your free email signature with our easy-to-use tool.
Mailblast - Email marketing on a budget using Amazon SES