authorSTREAM - authorSTREAM enables presenters to upload & share PowerPoint, Keynote & PDF presentations online; embed in blogs, convert to video and share on social networks.
Slidebean - Presentations that design themselves
PreZentit - Prezentit is an online presentation solution based on JavaScript that comes with new online collaboration tools.
Self Space Illustrations - Create juicy product presentations, faster
Zentation - Affordable webinar software. Create online presentations with synchronized video and PowerPoint.
SlidesPPT - Beautiful free presentation templates for Google Slides