The Zone Routing Protocol is a routing protocol suitable for a wide variety of mobile ad-hoc networks, especially those with large network spans and diverse mobility patterns.
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.
Mantis is a PHP/MySQL-based bugtracking system. It is extremely easy to deploy and customize, and features one of the simplest and cleanest interfaces of any tracking tool available.
Twinkle is a soft phone for your voice over IP communcations using the SIP protocol. You can use it for direct IP phone to IP phone communication or in a network using a SIP proxy to route your calls.