TwitViz allows you to set up periodic intervals for viewing twitter posts. Use these breaks as a reward for staying focused on your work, or as a reminder to break periodically to stretch your body and eyes. Tell TwitViz how often you want to break, and for how long, and the app will appear when it is time for your break, and disappear when it is over.
Screen Saver Mode:
Put TwitViz in screen saver mode and enjoy animated Twitter posts whenever your computer is inactive.