From Boray Software:
This program improves the processor frequency scaling features to get a really responsive system while saving power when the user is inactive. What it does is to change the system's power plan to one saving power when the mouse and keyboard isn't touched for a specified amount of time and then to a high performance plan when the mouse or keyboard is touched again. The program does NOT install any patches in your system. It just switches power plans exactly as if you would have done it yourself in the control panel. Configure the two power plans and the minimum processor state to your own liking. Read more on the BorayPower web page.
The cpu load setting was added. And as if Boray Power wasn't already lightweight - it's now even more so: It now uses only 0.32 MHz on one core in high mode (1.29 MHz before) and in low mode it uses 1.17 MHz (13.5 MHz before). The previous version of Boray Power was downloaded 4685 times but nobody at all has payed yet! Boray Power is NOT FREE! So come on guys!
The efficiency was improved even more: It now only uses 0.25 MHz in high mode and 0.60 MHz in low mode!