CPU-Z - CPU-Z is a freeware that gathers information on some of the main devices of your system : Processor name and number, codename, process, package, cache levels.
PowerTOP - PowerTOP is a Linux tool to diagnose issues with power consumption and power management.
Speccy - Speccy - find the details of your computer's specs. Great for spotting issues or finding compatible upgrades. Download the latest version free.
RMClock - RightMark CPU Clock Utility (RMClock) is a small GUI application designed for real-time CPU...
AIDA64 - AIDA64 is a system information, diagnostics and benchmarking solution for Windows PC.
upower - UPower is an abstraction for enumerating power devices, listening to device events and querying...