PixelMe - URL shortener for savvy marketers
MJML - The open source framework for responsive emails
chl.li URL shortener - A simple, modern, free and privacy-friendly URL shortener.
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.
Pixela - Record and Track your habits or effort. All by API.
Templates by Email Monster - Hundreds of free, responsive email templates. Pick and edit.