Slidebean - Presentations that design themselves
ClassPoint - ClassPoint is an all-in-one, interactive teaching tool designed to improve presenting efficiency and teaching with PowerPoint.
SlidesPPT - Beautiful free presentation templates for Google Slides
Embold.io - Peer Code Review
Slides - Slides is a place for creating, presenting and sharing presentations. The Slides editor is available right in your browser. Unlike traditional presentation software, like PowerPoint, there's no need to download anything.
Graphue - Bring Your Presentations to Life With Professional Engaging Templates. Discover the best PowerPoint, Google Slides, and Keynote Presentation Templates