OpenTrack is a Web Application Framework that boosts developer productivity by making use of a RAD PHP framework and a native XML database, thus allowing generic application data structures be stored and queried via AJAX out of the box, without the need to hard code application structures into the server code and database layers.
If you're looking for OpenTrack, the Motion Analysis Software, please visit http://opentrack.sourceforge.net.
Currently, OpenTrack is in the alpha stage. We will release more information in the coming weeks.