SlidesPro - Google Slides add-on w/ shortcuts, YT videos & more
GIFMaker for Mac - GIFMaker – Created a GIF from a video or Images is the easiest way to create an animated GIF on your Mac.
Brand Kit by Premast - Manage, share and create branded content in PowerPoint
Tall Tweets - Tall Tweets, now with support for 280 characters
Slideflow - Turn your Google Slides into a website in seconds.
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.