Share Presentations on the Web with SlideShare

SlideShare is kind of like the YouTube of slideshows. The site allows you to host and share your slieshow presentations online. You can upload powerpoint, keynote and pdf slideshows which can then be shared with someone via a link or by embedding code in to your site. The service istotally free and already has a strong community, with users posting all sorts of presentations – including ones with audio. Overall, there is a nice mix of educational, informative and just plain entertaining slideshows available on their site.