CoreMeter is a sidebar gadget, monitor your CPU and RAM's usage.

CoreMeter Features:
1. Add theoretically as many cores
2. Versatile design settings
3. Various sizes Gadget
4. Diagrams of the monitored values
5. Temperature sensing (Core Temp SpeedFan or required)

The license of this software is Freeware, you can free download and free use this cpu benchmark software.