Vectr - Free vector graphics editor. A simple yet powerful web and desktop cross-platform tool for everyone.
HTMLEmail.io - Responsive HTML email templates for startups & developers
Vecteezy Editor - Free Online Vector Editor - Design and customize SVG illustrations and graphics quickly and easily in your browser.
Startup Emails - Responsive HTML email templates for startups
Inkscape - Inkscape is a free, open source professional vector graphics editor for Windows, Mac OS X and Linux.
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.