Precursor - Precursor helps designers and developers communicate and collaborate in real time.

Slidebean - Presentations that design themselves

mi.team - Collaboration app with chat, task board & video conference

SlidesPPT - Beautiful free presentation templates for Google Slides

Justinmind - Define awesome experiences through wireframes & prototypes.

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.