DNSFilter!

OpenDNS is the leading provider of security and infrastructure services that make the Internet safer through integrated Web content filtering, anti-phishing and DNS. OpenDNS services enable consumers and network administrators to secure their networks from online threats, reduce costs and enforce Internet-use policies. OpenDNS is used today by millions of users and organizations around the world.

Google Public DNS is a free, global Domain Name System (DNS) resolution service, that you can use as an alternative to your current DNS provider.

Comodo Secure DNS is a domain name resolution service that resolves your DNS requests through Comodo worldwide network of redundant DNS servers. This can provide a much faster and more reliable Internet browsing experience than using the DNS servers provided by your ISP and does not require any hardware or software installation.It's quick and easy to change to Comodo Secure DNS. No downloads and it's absolutely free:8.26.56.268.20.247.20

NxFilter is a freeware web filtering software controlling user activity on Internet. You can monitor Internet usage in your network and block user request for websites with NxFilter. It offers many features like Active Directory integration, User or Group based policy assignment, Quota time, Dual policy for work-time and free-time, Runs everywhere including Windows, Linux, Mac, Embedded webserver and embedded DB, built-in GUI, Windows installer, Internationalized domain name support, Syslog exportation. »

SafeDNS is a cloud-based web filtering service providing users an efficient and easy-to-use way to maintain control over web access, limit time for web surfing, to monitor and manage online activity. The SafeDNS service ensures a safer web connection for users' individual devices (desktop computers, laptops, tablets, smartphones, etc.) and entire networks (by configuring the service on a WiFi router or a DSL modem). Any home user can protect up to 3 home networks (on Free plan with limited functionality). On a paid plan users get all of advanced service features. »

nxCloud is a commercial OwnCloud provider

There are thousands of infected and fraudulent Web site lurking on the Internet, with new ones popping up daily. So how do you know if a site is safe to visit or a dangerous site that should be avoided? Simple. Use Norton ConnectSafe. It automatically blocks dangerous Web sites so you can surf the Web without worrying about getting infected or scammed.