Sortd - Rated the #1 App for Gmail
HTMLEmail.io - Responsive HTML email templates for startups & developers
KanbanMail - A Kanban board for your emails.
Startup Emails - Responsive HTML email templates for startups
Drag for Gmail - Transform Gmail into organized To Do lists (like Trello)
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.