iStat pro

iStat Pro - is a free widget that displays information about your system.

iStat Pro shows you information about the performance of your processor, state RAM, hard drives, fans, time remaining battery life and temperature. The program displays it in the form of a panel of nine sections, the dimensions of which you can change independently, achieving maximal information widget.

but the manufacturer's website for some reason he became unavailable. That's why I posted it there: >>>