is there any software that allows me to turn on/off or control the speed of my system fans?

[LongCoolMother]

do they exist? i would really like to quiet down my system at night, since its loud and keeps me awake.

 

[RalfHutter]

A lot of people use SpeedFan, but there's also this one called FanSpeed!

 

[LongCoolMother]

thanks ralf hutter!