Loops Feedback - Feedback on design ideas in minutes via 110m+ people
Prezi - Welcome to Prezi, the presentation software that uses motion, zoom, and spatial relationships to bring your ideas to life and make you a great presenter.
Storydoc - Easily generate interactive decks and presentations that increase lead engagement and conversion
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.
Feedback by Pixelic - Painless design feedback and version control.
Slidebean - Presentations that design themselves