If you have a GPS device and want to track the device on real-time basis on a map, Web GPS Tracker will allow you to do this. It is a quick and dirty (but working) application.
friendly-settle is a tool for figuring out who pays what to whom after a series of transactions among members of a group (as after a group trip or similar event).
A GNU/Linux rescue CD that comes with Rescapp, a nice wizard that will guide you through your rescue tasks.
A tool for documenting which MQ components are installed and active on a particular server.