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.
SetCPU - SetCPU for Android is a powerful root utility that gives you full control of your Android device's CPU and more.
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.
Prime95 - Prime95 is a program that searches for new Mersenne prime numbers.