ScreenRest is a straightforward and easy-to-use application which reminds you to take regular rests from your computer. Using ScreenRest gives you complete control over how often, and how long, you wish to rest. You have the choice of being reminded to take rests at fixed intervals, or having your keyboard and mouse usage monitored to determine when it is best for you to take a rest.

EyeDefender is a freeware rest reminder designed to prevent Computer Vision Syndrome (CVS) resulting from working on a computer for hours on end. EyeDefender can also help to prevent other problems related to computer use, such as Carpal Tunnel Syndrome (CTS) or Occupational Overuse Syndrome (OOS). Learn more at: http://www.eterlab.com/eyes