Variety of Free On-line DNS Tools

BIND 9 on debian 3: How-to information on installing Bind 9 on Debian using chroot
BIND name server: An open-source name server widely used by the Internet community
BIND Nameserver links: Links, whitepapers, and how-to's for BIND 9
DNS Monitor: dnsmon provides a comprehensive, objective and up-to-date overview on the quality of service of high level DNS servers, currently these are the root servers and some participating TLD servers.
DNS tools &utilities: An assortment of DNS tools
DNS, BIND, DHCP, LDAP: Links, white papers, & presentations about DNS
Geek Tools Dig DNS: Web-based Dig DNS tool
Is your domain secure?: The goal of the DNSSEC-Tools project is to create a set of tools, patches, applications, wrappers, extensions, and plugins that will help ease the deployment of DNSSEC related technologies.