SlideShare began with a simple goal: To share knowledge online. Since then, SlideShare has grown to become the world’s largest community for sharing presentations and other professional content. SlideShare was founded in October 2006 and acquired by LinkedIn in May 2012. It allows users to easily upload and share presentations, infographics, documents, videos, PDFs, and webinars. In Q4 of 2013, the site averaged 60 million unique visitors a month and 215 million page views. SlideShare is among the top 120 most-visited websites in the world.
2. Prezi – Create Better Presentations
With slides, your audience is forced to think inside the box, losing the big picture of your presentation. Prezi changes all that by giving you the ability to create zooming presentations, zooming out to see the big picture of how your ideas are related, and zooming into the details.