Some of the most popular free and public DNS servers are Google, Cloudflare, Control D, CleanBrowsing, and Quad 9. While most of them do a great job with DNS, some of them have additional features ...

Check out our guide to configuring OpenDNS for more. Cloudflare also offers a DNS service called "1.1.1.1 for Families" which lets you filter for malware or both malware and adult content.