OpenNIC!

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.

Yandex.DNS is a free, recursive DNS service. Yandex.DNS' servers are located in Russia, CIS countries, and Western Europe. Users' requests are processed by the nearest data center which provides high connection speeds.

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

FoolDNS is a DNS service to protect user privacy. It blocks advertising from services that use it to track the user without authorization.

DNSReactor provides FREE Public DNS servers that you can use as an alternative to your local isp DNS servers. Take advantage of this FREE added layer of security NOW.

DtDNS provides DNS hosting and related services to everyone from home users to hosting firms with hundreds of domain names. Dynamic DNS is supported on all services.

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. »

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.

SaferNet is a cloud based (and alternatively on premise) provider of web filtering and internet security services using DNS technology.

Runs as a Windows service, supports any TCP/IP device. Display a blocked page as result of any domain name matched in the keywords list. Prevent installation of file sharing/P2P clients, spyware, or other malicious software - a technique referred to as DNS sinkhole or blackhole. Save bandwidth by blocking streaming audio/video, large downloads, or questionable material. Restrict online games, IM, pornography, and illegal content. Or, choose to block everything and allow only the sites you specify - known as DNS whitelist. »

Provided free of charge, Free Recursive DNS enables end users and businesses to experience a much more reliable, faster and safer Internet experience.

Free to use public DNS servers which filter unwanted advertisements and malware.

Doesn't just filter advertisements, but also most known malware sites (sites known to be harmful to your computer).On top of that, enables geo restricted content such as US Netflix, Hulu, Pandora and more.Advertising, malware and tracking lists are updated daily, so you don’t have to worry about staying up to date – you’re always automatically up to date!

Safe Web is a new web browser for iPhone and iPad devices. Don't worry anymore about what they browse as they only will see what you let they see. Safe Web is a bookmarking based Internet browser that only allows to navigate to some predefined websites or domains of your selection. Apart from that, Safe Web creates a sandbox environment where the user can't leave the allowed websites domains. For example: you can allow google.com but they can't navigate to a search result that is not in the allowed list. »