This document discusses several popular social media and online networking platforms: Facebook, Twitter, Blogger, Wikipedia, PBworks, WordPress, Second Life, Picasa, and YouTube. Facebook and Twitter are described as social networks for connecting with friends and following celebrities. Blogger and PBworks are blogging platforms where users can publish information and add applications. Wikipedia is summarized as a site where users can search for and contribute information. WordPress, Second Life, Picasa and YouTube are briefly mentioned but not described in detail.