Tilepad is a Twitter tool via a Chrome extension that arranges your screen in several columns and tiles bringing you customization in how you view Twitter. Their example
They are a simple UI tool great for large screens with quite a few options for customization
What user data is kept by Tilepad since they are a Chrome extension?
TilePad saves and stores your Google account email and the unique account identifier on the servers of TilePad. The email is used for synchronizing the extension on various devices that you use and sending updates on changes (off by default).
You can get more information on Tilepad and the extension at the Tilepad website.