If you are looking for a free keylogger software then Spyrix has many keylogger programs which work for the purpose. You can easily monitor your children or spouse activities on PC/Laptop, Phones etc.
It has free keylogger program as well as paid keylogger program, you can use according to your own purpose.
You can use any of these:
Spyrix Free Keylogger
Spyrix Personal Monitor
Spyrix Facebook Monitor
Spybubble
Call Tracking
SMS Tracking (http://www.spyrix.com/spybubble.php)
Email Tracking
And many others, please check http://spyrix.com for more info!