WiseStamp - WiseStamp allows you to easily create and implement slick and unique email signatures for your business.

Stripo - Stripo is an all-in-one email design platform. We enable our clients to build emails of any complexity, including interactive AMP emails, really fast and easy.

MySignature - MySignature is FREE Email Signature Generator that helps to create Professional Signatures for major email clients such as Outlook, Gmail...

Templates by Email Monster - Hundreds of free, responsive email templates. Pick and edit.

Exclaimer - Exclaimer is the industry's leading provider of email signature solutions, empowering businesses to unlock the potential of email as a key digital advertising channel.

MJML - The open source framework for responsive emails