SlidesPPT - Beautiful free presentation templates for Google Slides
Visme - One easy to use online tool to visualize your ideas to engaging Presentations, Infographics and other Visual Content.
Slidebean - Presentations that design themselves
Canva - Canva is a graphic-design platform with a drag-and-drop interface to create print or visual content while providing templates, images, and fonts. Canva makes graphic design more straightforward and accessible regardless of skill level.
Peetch - The last PowerPoint Pitchdeck you’ll ever need
Artboard Studio - Online graphic design app mainly focused on product mockups.