What it is
Basically, F.lux is a tool that is designed to help your eyes while using your computer at night. At predetermined times, F.lux makes your screen turn a sepia tone, which helps relieves eye strain.
Pros:
-Runs on every desktop operating system. There are versions for Windows, Mac OS X, and Linux (GNOME, KDE, XFCE, etc.).
-Super simple configuration. On Windows, you can run the installer, and F.lux configures all of the time settings for you.
-Screen temperatures (tints) are completely adjustable.
-Option to disable screen tinting for one hour
and most importantly...
-It works. The sepia tone on the screen is much easier on the eyes at night.
Cons:
-Automatic tinting gets annoying when you are working on something that requires crisp and accurate colors (such as gaming or image manipulation)
Bottom Line:
-If your eyes strain at night, or you just want easier reading, try out F.lux.
Rating: 9.5 out of 10. It does its job, and that's all you can ask from this program.
Download F.lux