Java Marine API is an NMEA 0183 parser library for Java.
See project website for more info and documentation.
Snapshots
Snapshots are deployed to sonatype.org every now and then, notice that these are usually work-in-progress.
Sourceforge
Project was originally published in Sourceforge.net, hence the net.sf package naming. Old project page and downloads are still there, but the old SVN repository is no longer updated.