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The libbind functions have been separated from the BIND suite as of BIND 9.6.0. Originally from older versions of BIND, they have been continually maintained and improved but not installed by default with BIND 9. This standard resolver library contains the same historical functions and headers included with many Unix operating systems. In fact, most implementations are based on the same original code. ISC's libbind provides the standard resolver library, along with header files and documentation, for communicating with domain name servers, retrieving network host entries from /etc/hosts or via DNS, converting CIDR network addresses, performing Hesiod information lookups, retrieving network entries from /etc/networks, implementing TSIG transaction/request security of DNS messages, performing name-to-address and address-to-name translations, and utilizing /etc/resolv.conf for resolver configuration.

pgeodns is a simple DNS server that can distribute load for a hostname to the nearest mirrors (as defined by geography; on the country / continent level). It is used for search.cpan.org/cpansearch.perl.org and for ftp.perl.org/ftp.cpan.org; to provide nearby-ish servers for the NTP Pool; and to balance svn.apache.org to svn.us.apache.org and svn.eu.apache.org.

This program is a domain name server analysis and reporting tool. It checks and reports whether a domain name, hosted by your organization, is still in use, and if so, reports whether your name servers are still the delegated name servers of the domain name in question. Reports are generated both to the console and as HTML output. HTMLs also include information about the MX and WWW records of the domain name. The tool is expected to be of great use for Internet Service Providers who are in need of keeping track of lame dns records.

DNSPerf and ResPerf Provide Communication Providers with Predictive Planning Tools to Scale Networks. Two tools, DNSPerf and ResPerf deliver accurate performance metrics of Domain Name Services (DNS). These tools are easy-to-use and simulate real Internet workloads to provide the necessary insight that carriers need to plan and deploy network services. DNSPerf measures Authoritative Domain Name services and is designed to simulate network conditions by self-pacing the query load. Caching services performance and workload profile differ significantly from Authoritative Domain services; therefore a different tool is needed. ResPerf is designed specifically to simulate Caching Domain Name services. To test a caching server, ResPerf systematically increases the query rate and monitors the response rate.

YADIFA is a lightweight authoritative Name Server with DNSSEC capabilities. Developed by the passionate people behind the .eu top-level domain, YADIFA has been built from scratch to face today?s DNS challenges, with no compromise on security, speed and stability, to offer a better and safer Internet experience. YADIFA has a simple configuration syntax and can handle more queries per second while maintaining one of the lowest memory footprints in the industry. YADIFA also has one of the fastest zone file load times ever recorded on a name server. YADIFA was developed on FreeBSD and a GNU/Linux. It works on OSX and will be soon ported to other Unix flavours like OpenBSD and Solaris. A Microsoft Windows version is also on the cards.

Net::DNSBL::MultiDaemon is the Perl module that implements the multi_dnsbl daemon. multi_dnsbl is a DNS emulator daemon that increases the efficacy of DNSBL look-ups in a mail system. multi_dnsbl may be used as a stand-alone DNSBL or as a plug-in for a standard BIND 9 installation. multi_dnsbl shares a common configuration file format with the Mail::SpamCannibal sc_BLcheck.pl script so that DNSBL's can be maintained in a common configuration file for an entire mail installation. Because DNSBL usefulness is dependent on the nature and source of spam sent to a specific site and because sometimes DNSBL's may provide intermittant service, multi_dnsbl interrogates them sorted in the order of greatest successful hits. DNSBL's that do not respond within the configured timeout period are not interrogated at all after 6 consecutive failures, and thereafter will be retried not more often than once every hour until they come back online. This eliminates the need to place DNSBL's in a particular order in your MTA's config file or periodically monitor the DNSBL statistics and/or update the MTA config file.

Autotrust is a command line tool to automatically update your DNSSEC trust anchors. It is intended to run from a cron job and can run next to any validating resolver. It makes use of ldns and libunbound.

The user space command line tools from the latest version of BIND: delv, dig, host, nslookup, nsupdate It also includes various dnssec related tools: dnssec-dsfromkey, dnssec-importkey, dnssec-keyfromlabel, dnssec-keygen, dnssec-revoke, dnssec-settime, dnssec-signzone, dnssec-verify

GNU Libidn is an implementation of the Stringprep, Punycode, and IDNA specifications defined by the IETF Internationalized Domain Names (IDN) working group. It is used to prepare internationalized strings (such as domain name labels, usernames, and passwords) in order to increase the likelihood that string input and string comparison work in ways that make sense for typical users throughout the world. The library contains a generic Stringprep implementation that does Unicode 3.2 NFKC normalization, mapping and prohibition of characters, and bidirectional character handling. Profiles for iSCSI, Kerberos 5, Nameprep, SASL, and XMPP are included. Punycode and ASCII Compatible Encoding (ACE) via IDNA are supported.

Bindgraph makes pretty query statistics about BIND servers. It was derived from well-known mailgraph package.