KDT Site Blocker is an easy to use tool to block access to certain websites. It works with any browser (IE, Firefox, Opera etc.) and will automatically display a generic `blocked` page whenever a blocked site is accessed. To block a site, all you need to do is add the domain name to the list. The admin interface is password protected.

The license of this software is Free Trial Software, the price is $12.95, you can free download and get a free trial.