Happy Camel, match your GPS with your digital photographs
TuxMobil: Linux Applications for GPS Navigation
GpsDrive - GPS navigation for Linux
Moving map GPS display
GPS Manager Home Page
Manages GPS tracks, routes and waypoints
KFLog-Portal
Free maps, and GPS real time interfacing, and more - integrated aviation solution - moving map GPS - all for free
Jkx@Home / Howto to get openGL working on Debian (for Google Earth)