mDNS Responder with Unicast runs on a server anywhere in a network and responds to mDNS queries across the network by performing a unicast DNS lookup and returning the result. Many networks use a .local top-level domain for their intranet. This has proven to be quite problematic as operating systems such as OS X have begun handling .local domains differently (in particular, prioritizing multicast DNS over conventional unicast DNS). Ideally, you'd have no problems moving away from a .local domain name, or simply not using one in the first place. That's not always possible, though. So with this tool, a lookup for "host.local" will be resolved via your existing unicast DNS servers, even if "host" does not have its own mDNS responder. Of course, the tool isn't limited to just .local domains, and can realistically work on any network where mDNS is in use.
The LogicBoxes API is a full-control set of programming interfaces that allow you and your resellers to develop your own Website and control panels and integrate them into LogicBoxes OrderBox. Every function of LogicBoxes OrderBox is exposed via the OrderBox API. You can duplicate any or all of the functionality at your end by integrating into the API. The API comes with a specification, client side kits, sample forms, sample code, and complete documentation. Integrating with the API is a breeze. The API is based on SOAP/WSDL. Client side kits are available in PHP, Perl, ASP.NET, and Java. Additionally, since the protocol is standards-based, the API is truly platform independent. Monitoring systems prevent API abuse and any denial of service attacks on the API servers. The API is scalable and secure.
Open Domain Server Update Client is a client in C, intended for Unix users, and will update your DNS records on the ODS server (http://www.ods.org/) with your new IP. A reborn dynamic DNS provider, ODS used to exist as the second largest dynamic DNS provider. After some downtime, it is now back up with 13 domains to choose from. The service is free.
Libdnsres provides a non-blocking, thread-safe API for resolving DNS names. It requires that your main application is built on top of libevent. The API essentially mirrors the traditional gethostbyname and getaddrinfo interfaces. All return values have been replaced by callbacks instead. The code borrows heavily from the BSD resolver library. In fact, it is an extremely ugly hack to make the BSD resolver library non-blocking and thread-safe without changing the API too much. Although it has not been tested heavily, it should compile on BSD systems and Linux. The library comes with a simple test program that can be use to verify if it works correctly.
OpenDD is a DynDNS client, written in C, and especially designed for small gateway machines, like a Soekris box. Its main feature is that it does not require any Perl or Python interpreter. It supports HTTPS, can send a mail report, and can run as daemon. It is also very easy to deploy.
Batch-DNS Module simplifies adding any number of master or slave DNS domains for a server running Bind 8. It can chain to another instantiation of itself on another server, so that after adding the master records, it can automatically add slave records. Any number of slave servers can be chained in series to the master server. It is also written to accept DNS records from Batch-Apache.
cqueues is a comprehensive event and networking library for Lua 5.2 and LuaJIT using modern Unix O(1) polling facilities. It includes libraries for buffered socket I/O, SSL/TLS sockets, DNS querying, signal handling, threading, file change notification, and X.509 key management. It natively supports Linux, *BSD, OS X, and Solaris systems without third-party dependencies, and is interoperable with any event loop that accepts plain descriptors, or is usable standalone.