Aeon Timeline - "The timeline tool for creative thinking. Capture, create and explore ideas."
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.
Preceden - Preceden makes it easy to build simple, powerful timelines
Slidebean - Presentations that design themselves
Timeline - Timeline is a cross-platform application for displaying and navigating events on a timeline.
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.