CPU Frequency Selector - Cinnamon CPU Frequency Selector Applet
Udev Discover - A helping tool for udev testers, coders, hackers and consumers.
AIDA64 - AIDA64 is a system information, diagnostics and benchmarking solution for Windows PC.
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.
SiSoftware Sandra - SiSoftware Sandra (the System ANalyser, Diagnostic and Reporting Assistant) is an information &...
HeavyLoad - The individual test methods employed by HeavyLoad can be customized to fit your needs.