Any Weblock is a little, web content control software that lets you block any website that you don’t want open on your computer. It can be used, for example, as a parental control to prevent children from accessing sites like online games, prone or chat rooms. It works with any web browser and displays a fake error page.
The application is extremely simple to use, no network knowledge required to configure. You only need to know the domain (http://example.com) and sub-domain names (www, xyz,) of the websites to be blocked.
Moreover, blocking remains intact even after uninstalling the app, unless properly unblocked by this program. Any Weblock can be downloaded (362Kb) at here.