Software-Karte

Dual DHCP DNS Server is a DHCP server combined
with a caching DNS server that is sensitive to the
names that were allocated by the DHCP server. It
has built in dynamic updates, and also supports
BOOTP PXE network booting and client specific
options. It is self-configuring, doesn't require
the creation of zone files, and uses little memory
and CPU time. Either one of the two services can
be turned off.

pdnsd is a Proxy DNS server for Linux and FreeBSD that is designed to cope with unreacheable nameservers (e.g. because the dial-in link is not up) in a graceful manner to prevent DNS-dependent applications like Netscape from hanging. It has a permanent disk cache (i.e. the cache contents are saved in a file on exit) and supports parallel query and a wide variety of link uptests. It also has the ability to serve some types of locally defined records.

dnstracer determines where a given Domain Name
Server (DNS) gets its information from, and follows
the chain of DNS servers back to the servers which
know the data.

MyDNS is a free DNS server for Unix. It was implemented from scratch and is designed to serve records on-the-fly, directly from a MySQL or PostgreSQL database.

Admin4 is a tool for server maintenance via several plugin modules, running on Windows, Mac OS X, Linux, and many more platforms. Currently, plugins for BIND DNS, LDAP, and PostgreSQL are included. It is designed as a framework, using Python for fast development of plugins and custom modifications. The DNS plugin should be able to query (axfr) any type of server, and performs updates via DDNS, which ensures that it won't interfere with other DDNS clients (DHCP, SAMBA4). For BIND 9.7 and up, statistics are supported as well and used to retrieve the server's zones automatically. The LDAP plugin features browsing and generic editing of all types of LDAP entries with schema support. In addition, high-level editing of objects like users, groups and samba domains is supported. Custom objectClasses and attributes can easily be added. The PostgreSQL module features a query tool with centrally stored snippets, a data tool with filter presets and a database object browser.

YaCy is a search engine that anyone can use to index the Internet (WWW and FTP) or to create a search portal for others (Internet or intranet). The scale of YaCy is limited only by the number of users. and can index billions of web pages. In P2P mode it is fully decentralized. All users of the search engine network are equal and it is not possible for anyone to censor the content of the distributed index.

dnsjava is an implementation of the DNS protocol in Java. It supports all of the common record types. dnsjava provides both high and low level access to the resolver. The high level functions perform queries for records of a given name, type, and class, and return an array of records. A cache is used to reduce the number of queries sent. The low level functions allow direct manipulation of dns messages and records, as well as allowing additional resolver properties to be set. A 'dig' clone, dynamic update program, and basic server are also included. Extensions to the DNS protocol are supported as well (DNSSEC, TSIG, EDNS0).

UpdateDD is a command line tool that updates a
dynamic DNS record. It supports the following
features: Web-based IP-detection, IP address
caching, configuration files with C-like syntax,
simple interface for managing multiple accounts
and hostnames, and status output to syslog.
Supported services include: changeip.com,
dyndns.org, eurodyndns.org, ovh.net, no-ip.org,
ods.org, hn.org, regfish.com, and tzo.com.

ANDReA is a LAMP-based system for registration of network clients using DHCP. Splitting the network into "boot-net" for unregistered users and a "real-net" for registered users makes it possible to gather information about users in the network. Additionally it is possible to detect active services (FTP, WWW, a game server, etc.) and unregistered computers in the network. It is mainly used for LAN parties. 

Sauron is a free DNS/DHCP management system with
Web and command line interfaces. It is able to
manage multiple DNS/DHCP servers. Complete dhcpd
and named configurations are generated from a
central SQL database.

freedns-afraid is a dynamic DNS client or updater, a Linux daemon which keeps your record on the free dynamic DNS service freedns.afraid.org up-to-date. The rpm is built for Fedora, but it should work for other rpm-based Linux distributions which use systemd and NetworkManager.

WeBBind is a Web interface for admin BIND DNS servers. It is written in PHP for everyday usage.

PHP Net_IDNA is a class to convert between the
Punycode and Unicode formats. Punycode is a
standard described in RFC 3492 and part of IDNA
(Internationalizing Domain Names in Applications
[RFC3490]) . This class allows PHP scripts to
convert these domain names without having one of
the PHP extensions installed. It supports both IDNA 2003 and IDNA 2008.

SuaveDNS is a set of Perl and PHP programs which
allow DNS administrators to easily add, remove, or
update zones with an easy to use Web-based
control panel. The DNS server is DJBDNS, and the
data is stored in a MySQL database.