GPS log file viewer and analyzer
Synthetic Vision/Sectional Maps for experimental aircraft.
An easy-to-use bike equipment manager and bike rides manager
GPS mapping and management software
Reading Position, Velocity, Time from a GARMIN GPS via native USB
Mark GPX files as found based on My Finds Pocket Query
My take on syncing Garmin Forerunner in Linux
A Linux ANT+ driver (for Garmin sport watches)
A frontend for gpsbabel
Read the data off your garmin forerunner 305
Unofficial C# Garmin Connect Website API.
A tool to copy Geocache photos to a Garmin device