Cozy is just what it says on the tin - it's a personal cloud that you access with your web browser. It has a contacts app, a feed reader, bookmarks, photo album, chat client, calendar, notepad, music player, and more. An appstore is planned for the near future. Easy to set up, you can even do it with cut-and-paste. Lightweight enough that you can run it on a RaspberryPi or Linux on a USB key if you want.