A system that shall predict good days and locations for cross country free flying such as paragliding by comparing current weather predictions with statistics about past weather predictions and flights from online contests.
The system and the android app are both open source.
The project is hosted on :
http://sourceforge.net/projects/flightpred/
Here is how it works:
http://flightpred.svn.sourceforge.net/viewvc/flightpred/trunk/doc/index.html?revision=296
Contributions are welcome.
Currently, the software is in beta and the nights are only so long...
Also please consider donating (link on the sourceforge project page). That would allow for a more powerful and reliable server infrastructure.
At the moment the server hardware doesn't allow for more flying sites, but if you can still suggest one.