WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.
Nova Inbox - Personalize emails in seconds, right from your inbox
Mailcastr - Create email signature that tells when your email is read.✉️
Gmail Mail Merge - Send personalized emails with attachments
Email Signature Template Generator - Create your free email signature with our easy-to-use tool.
InboxSDK - First usable API to write Gmail Apps for 1B active users