CPU Spy is described as 'This is a simple app to display the time the CPU spends in each frequency state. This can be a useful tool in diagnosing battery problems or tweaking your over-clock settings. It also displays the current kernel information'. There are more than 10 alternatives to CPU Spy for a variety of platforms, including Android, Windows, Android Tablet, iPhone and Blackberry. The best alternative is CPU-Z, which is free. Other great apps like CPU Spy are AIDA64 (Paid), CAM (Free), CPU Info (Free, Open Source) and AgaueEye (Free).
CPU-Z is a freeware system profiler (system monitor) application for Microsoft Windows (for all versions from 95 on) that detects the central processing unit, RAM, motherboard chipset, and other hardware features of a modern personal computer, and presents the information in one...
AIDA64 is a system information, diagnostics, and auditing application developed by FinalWire Ltd., that runs on Windows, Android, iOS, Windows Phone and Tizen operating systems. It displays detailed information on the components of a computer.
AgaueEye is a hardware monitor with in-game overlay tools(FPS) for Windows, with AgaueEye, you can monitor your hardware, like CPU/GPU/MB/HDD/RAM states, and display overlay when you playing games, AgaueEye also record the states for post analysis.
Linpack is a benchmark and the most aggressive stress testing software available today. Best used to test stability of overclocked PCs. Linpack tends to crash unstable PCs in a shorter period of time compared to other stress testing applications.
Remote System Monitor is an Android or BlackBerry software which allows to get advanced system and hardware information from your windows computers on your Android or BlackBerry devices over the network.