End User Internet Monitoring for Supervisor recommendations

I have a friend in a shop that is not running any robust Websense like applications. They are looking for a freeware solution or possibly inexpensive solution just for a few requests not for the entire company. I used one a while back but I since have lost the information and that PC that I dropped the application on has since been rebuilt. Does anyone have any recommendations that meet the following requirements: 1) A Supervisor can navigate to a url to see end user's internet activity. 2) Freeware or close to it -- Thank You, Joe