Flashlight is a program written for cell phones in Java--specifically the J2ME. If your cell phone runs Java games, it should be able to run this program. It keeps your phone's backlight turned on and toggles between on, flashing colors, and off. controls:

• 0=quit
• 1=on / flashing / off
• 2=show this
• Colors [Hold down keys]:
  • 4=turn up red
  • 5=turn up green
  • 6=turn up blue
  • 7=turn down red
  • 8=turn down green
  • 9=turn down blue
• Max red green and blue is white.
• Min red green and blue is black.

This software is released under the GPL and is free as in freedom. It contains no ads, viruses, or any of that crap that I have seen in other apps. It is not a demo.