OpenDNS for web filtering

If you have kids, or you manage the company firewall/proxy server, this service can be of great assistance to block unwanted sites. It is DNS based, and managed from a browser, so you have little (possibly in the case of dynamic ip) or no software to install to start using the service. All you have to do is change the DNS servers on your firewall/proxy.

For more info, go to to their site.