Viking is a free/open source program to manage GPS data
GDAL wheels for python and C/C++ projects (Linux only)
A C library for parsing/normalizing street addresses around the world
Analysis and display of Census, business, government attribute data
A reference implementation of the Polish geobotanical grid
#5A - STM32L496 based module for free development
#3A - GPS assisted tracking device with GSM connectivity and a lot of
Visualize data from the opencellid.org project