YouOS is another "Web desktop" application created by some smarties from MIT, Caltech and Stanford, but with a twist. It literally is an OS. Already developers have developed dozens of little plug-ins. These include Flickr and YouTube widgets, weather, Gmail, instant messaging and more. The competitors in this sector are too many to mention and some are folding, but I don't think we've seen the end of innovation in this space. Look for the stronger brands to get acquired.
YouOs, Web Desktop