F.lux is a tiny piece of software that adjusts the color of a computer display to the time of day, warm at night and like sunlight during the day.

After installing f.lux which is a piece of cake, you have enter your location. The software adjusts the color and brightness of the monitor according to these daylight settings and actual time.

Screenshot: f.lux

It took me little time to get used to the new display settings. It's less bright at night and a bit 'warmer'. Since I experienced it's less tiring for my eyes, I won't live without it. Nor at work, nor at home. F.lux consumes on my (desktop) computer about 5 MB of RAM.

F.lux is available for Linux, Mac and Windows. It can be downloaded for free at the f.lux website.