Slidebean - Presentations that design themselves
authorSTREAM - authorSTREAM enables presenters to upload & share PowerPoint, Keynote & PDF presentations online; embed in blogs, convert to video and share on social networks.
Self Space Illustrations - Create juicy product presentations, faster
projeqt - With Projeqt, your presentations never remain static. Pull in live tweets or blog feeds, insert an interactive map, add audio notes or stream videos. Let your presentations be as dynamic as you are.
SlidesPPT - Beautiful free presentation templates for Google Slides
Zentation - Affordable webinar software. Create online presentations with synchronized video and PowerPoint.