flux

[BlinkOk]

not directly for playbasic but for people who spend all day in front of a screen.
this app will adjust the intensity of the screen based on the time of year and time of day so your not staring at an intensely bright screen all the time

(login required)

[OldNESJunkie]

I like that utility, works pretty good. I was a little skeptical to be honest, but pretty cool.