Buy It Now: Free, Stereopsis

Give your eyes a break alread. With the F.lux Screen Dimmer, your monitor will automatically adjust it's brightness to the time of day. The later it is in the day, the lower the tint of your monitor will be, and the earlier in the day, the more the tint will fade. If you want to see how your monitor will look, F.lux has a preview option that shows you what the dimming will look like. Surf the net guilt free at 2 a.m. without giving your eyes too much of a workout.