adsuck is a small DNS server that spoofs blacklisted addresses and forwards all other queries. The idea is to be able to prevent connections to undesirable sites such as ad servers, crawlers, etc. It can be used locally, for the road warrior, or on the network perimeter in order to protect local machines from malicious sites.
PDNSOps, is a Web-based script which aids in administering domains and records for the PowerDNS SQL name server software. It is targeted mainly toward individual domain owners, but should be robust enough to be used in a larger capacity by an ISP or other big host. For those who may not know, PowerDNS is a domain name server application, much like BIND, but offering alternative backends for the storage of domain information.
Net::DRI is an object-oriented Perl library with a uniform API to access services from domain name registries/registrars/resellers. With protocols (RRI, RRP, EPP, and XCP), it handles EU, BE, SE, PL, WS, MOBI, AERO, CAT, US, COM, NET, ORG, BIZ, INFO, COOP, LU, AT, FR, NAME, NU, ASIA, TV, CC, AU, UK, NO, DE, CH, LI, HN, SC, VC, AG, BZ, LC, MN, ME, CZ, TRAVEL, PRO, JOBS, BR, PT, SI, IM, IT, CO.CZ, TC, VG, GD, NL, AU, CA, GL, CentralNIC, and CoCCA, all with extensions. It can also perform Whois queries, domain availability checks (DAS), ENUM registrations (IENUM +43) and validations, IRIS DCHK (RFC 3981 and 5144) for .DE, and operations through the APIs of BookMyName, OVH, Gandi, AdamsNames, and OpenSRS. It also includes a shell to leverage all its power without a single line of code. It has a flexible and robust logging framework, and handles internationalization issues, DNSSEC, and IPv6.
nss-mdns is a plugin for the GNU Name Service Switch (NSS) functionality of the GNU C Library (glibc) which provides host name resolution via Multicast DNS (a.k.a. Zeroconf, a.k.a. Apple Rendezvous, a.k.a Apple Bonjour). This effectively allows name resolution by common Unix/Linux programs in the ad-hoc mDNS domain .local.
dnscrypt-proxy acts as a DNS proxy between a regular client, like a DNS cache or an operating system stub resolver, and a DNSCrypt-aware resolver, like OpenDNS. The DNSCrypt protocol focuses on securing communications between a client and its first-level resolver. While not providing end-to-end security, it protects the local network (which is often the weakest link in the chain) against man-in-the-middle attacks. It also provides some confidentiality to DNS queries.
Host is a complete and powerful command-line based DNS query and testing tool. It has many of the same basic features as other similar tools such as nslookup and dig, but it has more extensive testing and test automation features. Host also has a much more standard (i.e. Unix-based) command-line user interface.
NicTool is a DNS management suite with support for various DNS servers (djbdns, BIND, PowerDNS), SQL data storage, DNS entry parsing (RFC 1034 & 1035 compliance), tiered and delegated permissions so you can safely grant access to clients and admins, giving them only the permissions they need. Humans interact via the Web interface, and an API is used for scripting mass updates, DNS templates, provisioning, and more. All changes are logged to easily track change history and see who changed what, and when.
NSC is a set of utilities for easy administration of DNS servers. You write very simple configuration files and NSC automatically generates zone files, reverse zone files, and configuration for the BIND. Among other things, it also supports classless reverse delegations and IPv6 addressing. NSC is written in POSIX shell and GNU M4, and it should run on all systems where these two languages are available. Generation of DNS daemon config files is currently limited to BIND 8 or 9, but it's very easy to add your own config file generators for other daemons.