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).
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.
A flat assembler RAD IDE.
A LilyPond sheet music editor.