trakkcor tracks your position via gps and submits the position data to your server. All you need is a j2me-compliant mobilephone which supports JSR-82 and an external gps receiver.
The GPS Simulator simulates a GPS receiver which emits NMEA sentences over Bluetooth. It can be used to test location based applications on real mobile devices, in particular on mobile devices which have a JSR 179 implementation based on a connected GPS.
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The Free Location Api is a free implementation of the JSR-179 Location API for J2SE.
It also extends the functionality to allow aggregating of multiple location technologies and seamlessly transitioning between them. (GPS, BT, WLAN,...)