Ever wondered where the corny PPTs that flood your emailbox come from? Well, slideshare.net has something to do with it. The site is simply a community to share, swap or comment on your or other peopleâs presentations. This great idea entails a large danger, which is massive amount of useless stuff but hey, the people that created this site work with PPT, so they know about big concepts and radical one-step solutions: tagging and categorizing. This means that when visiting this site you will be presented with the most popular slides, plus siteâs recommended content, but if you know your way around you will find interesting, arty, original and sophisticated slides and ideas as well, which you canât use in themselves (presentations play in flash and not powerpoint) but which can be used to spark up your creativity. Also, since the site allows unlimited uploading, it is a very good resource for teams of workers to share their thoughts and plans, and also for traveling orators, as a way to keep a safe copy just in case wellâ¦ something happens. The site works in several western languages and major asian ones too.