JmDNS

If you're looking for service registration and discovery capabilities, the JmDNS project has just what you need. Not only that, but it also seamlessly integrates with Apple's Rendezvous service. The Zeroconf working group is committed to zero configuration IP networking, and JmDNS fits right into that mission. Its use of multi-cast DNS and DNS service discovery offers a hassle-free way for devices and services to register themselves and find other network-based services without having to rely on centrally administered services.

While Java isn't typically considered a good choice for low-level network configuration, it excels at service registration and discovery. That's where JmDNS comes in - this pure-Java mDNS implementation is simple to use, and it's compatible with most JDK1.4 compliant VMs. It's worth noting that JmDNS is licensed under the GNU Library or Lesser General Public License (LGPL).

Overall, JmDNS is a fantastic resource for service registration and discovery. It's easy to use, compatible with most virtual machines, and offers a reliable way for devices and services to connect without having to rely on centralized administration. If you're on the hunt for these kinds of capabilities, give JmDNS a try.