GeoQO is a waypoint, geocaching, and waymarking database. It is extremely fast and offers a wide variety of utilities for manipulating waypoints. Though designed for geocaching and waymarking, it should be usable for any waypoint management. It is highly extensible; writing new import, export, search, display, and other plugins is easy to do.
np is a compact NMEA parser. It provides quick and flexible access to GPS data from various sources. Data can be read from devices, text files, STDIN, or GPSD (raw mode). The list of supported NMEA sentences includes $GPRMC, $GPGGA, $GPGSA, $GPGSV, as well as Garmin's proprietary $PGRME and $PGRMM. By employing user-definable stylesheets, the parser output can be adapted to numerous application scenarios. The parser can be queried directly from the console or through the included Web front end.
mapview is an application for viewing maps on Palm OS handhelds. You can scroll through a map and switch between different layers. Layers may be used for different zoom levels. mapview includes a Perl program for building maps from image files on a Unix/Linux desktop. Instructions and a Makefile for building a demo map are included.