Self-hostable alternative to Google Timeline
Open Source Routing Machine - C++ backend
Viking is a free/open source program to manage GPS data
GPS track editor for editing tracks and planning (multiple) day tours
Open source cross-platform Java Visual Traceroute
a simple virtual world editor
A C library for parsing/normalizing street addresses around the world
eGPXviewer is a 3D GPX track viewer
View your WKT geometries
CAD 2D for Land Surveying and Civil
Raster layer editing toolbar for ArcMap 10.x
Automate merging / importing of country data from different sources