BlueNMEA is an Android application which sends location data over Bluetooth (RFCOMM) or TCP in the NMEA format.
I wrote this program to feed my PDA running XCSoar.
The current README file.
BlueNMEA can be installed from Google Play, or from my server.
The source code can be obtained with git:
git clone git://github.com/MaxKellermann/BlueNMEA