So I asked a similar question here but it was considered a duplicate: https://stackoverflow.com/q/6181191/319862
This time I will be a little bit more specific...
Are there any open source projects that can control the pwm frequency of a motherboard fan header. Please share links. The only software I can find is Speedfan and it does not seem to make the source available.
The next best thing I found was openhardwaremonitor, but it does not control fan speeds yet according to the issues list on google code.
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I am mainly interested in Windows at this time, although a cross platform project would be great.
lm-sensors provides a fancontrol tool that can change the speed of your fans, along with some nice calibration tools to help you maintain reasonable temperatures with minimum energy and noise. Excellent tools.