Many web surfers regularly make purchases online, visit online banking
sites, stock brokers, etc. They frequently enter their credit card
information, account numbers, SSN numbers. If PC is attacked with a
Trojan program that logs keyboard sequences this may obviously lead to
money or identity thefts. Obviously, this is the one of the worst
things that can ever happen to a person and his or her family.

I am looking for software package that can detect and list any
keyboard loggers (known and unknown) installed on a PC computer under
Windows.
Must be able to detect any sort of loggers including Trojans or
commercial software like this one (http://www.spectorsoft.com)
I did some research on Google but was unable to find one so I am
writing this request.

Latest anti-virus tools with pattern scan technologies will not work.
It must be some kind of the system-level monitoring tool that can be
able to detect all the processes hooked to the system keyboard event
handlers so the user can decide whether these are legitimate processes
or not.
As you know, recently the code of a famous computer game Half-Life 2
was stolen. Regularly updated anti-virus programs did not help as
stated by Valve employees. Perhaps it was a targeted attack with a
specially written key logger involved
(http://www.gamemarketwatch.com/news/item.asp?nid=2786)