CPU-Z is a freeware program that gathers information on some of the main devices of your system such as:
Name and Number
Core Stepping and Process
Internal and External clocks, clock multiplier
Supported Instructions sets
Mainboard and Memory and Windows Version and DirectX version is also shown
ClockGen is an program dedicated to overclocking. Its main purpose is to change the system clocks on the fly : FSB (Front Side Bus) and GSB (Graphic Side Bus). ClockGen also provides some functions that allow you to improve and monitor your overclock.