DNSSEC.net - Offers information about security extensions for the domain name system. Includes articles on news and current developments, presentations, and requests for comments.
DNS Spring Cleaning Project - A project of Men&Mice to improve the function of DNS on the Internet by providing tools and support to elimiate common errors.
adns - Advanced, easy to use, asynchronous-capable DNS client library.
OpenDNS - OpenDNS provides a safer, faster, smarter, and more reliable way to navigate the Internet.
