JGPS

If you're looking for a reliable and free GPS communication library, look no further than JGPS. Written in Java, this extensible library has got you covered when it comes to handling standard GPS sentences including GLL, GGA, RMC, GSA, and GSV. And, if you're in need of handling any other sentence types, you can easily extend it on the application-level.

JGPS also comes bundled with a couple of added features - a GUI-based GPS tool and a console-based version. This makes it incredibly easy and convenient for you to make use of the library in your GPS communication work. Best of all, it is completely open-source giving you the freedom to tinker with it and customize it to meet your specific needs. So, if you're in search of a Java-based GPS library that ticks all the right boxes, JGPS deserves your attention!