I use this one
http://www.refog.com/keylogger/ for my daughter. She is a sneaky pre-teen. Depends on what you are looking for. This one is free and it logs all the websites she visits and every key that is pushed.
I forgot to mention it is the KGBkeylogger and the download is at the bottom of the page. It should still be free as it is freeware.
HINY