arandr - ARandR is designed to provide a simple visual front end for XRandR.
Prime95 - Prime95 is a program that searches for new Mersenne prime numbers.
cpuid - cpuid dumps detailed information about the CPU(s) gathered from the CPUID instruction, and also...
HeavyLoad - The individual test methods employed by HeavyLoad can be customized to fit your needs.
ddcutil - ddcutil is a Linux program for querying and changing monitor settings, such as brightness and color levels.
CPU Frequency Selector - Cinnamon CPU Frequency Selector Applet