Slidesgo - An extensive catalog of free Google Slides themes and PowerPoint templates.
GroupClip - Shoot synchronized video clips together with your friends.
SlideModel.com - Create attractive presentations with our professional PowerPoint templates, slide designs, and themes. Use our PPT templates and slide designs to give unique appearance to your presentation.
KnowledgeVision - Interactive multimedia online presentations made easy for content marketing, e-learning & more. Powerful desktop & iPad software combines video, PowerPoint.
SlideTeam - Transform rough sketches, notes into professional PowerPoint presentations.
Wheel - Themed video stories with the world