HTMLEmail.io - Responsive HTML email templates for startups & developers
Shorten.REST - A URL shortener API you can depend on
Startup Emails - Responsive HTML email templates for startups
Pixela - Record and Track your habits or effort. All by API.
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.
Cutt.ly - Free custom URL Shortener and branded URLs with advanced links tracking and Link Management Platform & API.