NotCPUCores - Functionally the same as CPU Cores, but free.
Prime95 - Prime95 is a program that searches for new Mersenne prime numbers.
Process Lasso - Process Lasso is NOT yet another task manager.
CPU Frequency Selector - Cinnamon CPU Frequency Selector Applet
No-frills CPU Control - No-frills CPU Control is a tool you can use on your rooted device to quickly set the CPU...
System Stability Tester - System Stability Tester - Test your system's stability and performance by calculating millions of digits of Pi.