An open-source bike computer with GPS and ANT+ capabilities, based on the Raspberry Pi Zero (W, WH, 2 W) or the Compute Module Zero. It also includes offline maps and navigation.

GPS log file viewer and analyzer with support for GPX, TCX, KML, FIT, IGC, NMEA, SLF, SML, LOC, GPI, GeoJSON and OziExplorer files.

convert KML, TCX, and GPX to GeoJSON, without the fuss

Convert your Huawei Health sport activities and import them in Strava.

Convert workout data from Peloton into JSON/TCX/FIT files and automatically upload to Garmin Connect

Viking is a free/open source program to manage GPS data (inc GPX, FIT, TCX and KML files). You can import and plot tracks, routes and waypoints, show OpenStreetMaps (OSM), Bing Aerial and other maps, generate Mapnik maps, geotag images, make new tracks, routes and waypoints, see real-time GPS position, etc. It is written mostly in C with GTK

Leaflet plugin that allows to add elevation profiles using d3js

Sauce for Strava™

Analyze your data from Garmin, Suunto, Coros to one centralized app

A Library for processing GPX, TCX, FIT and JSON files from services such as Strava, Movescount, Garmin, Polar etc

A makeshift python tool that generates TCX files from Huawei HiTrack files

Free your data from Polar FlowSync

Downloads gpx, tcx or original fit files from your Garmin Connect Account.

Example scripts for parsing data exported by popular fitness tracking devices and apps. Created for this article: https://towardsdatascience.com/parsing-fitness-tracker-data-with-python-a59e7dc17418

Converts Flexible and Interoperable Data Transfer (FIT) files to Training Center XML (TCX) files

PHP Library for parsing running GPS activities (.TCX .GPX .PWX .CSV)

tcxreader is a reader / parser for Garmin’s TCX file format. It also works well with missing data!

Analyzes GPX, TCX, and FIT files. Automatically identifies intervals. Allows files to be split and exported. Does all processing in browser.

RunPandas - Python Package for handing running data from GPS-enabled devices to worldwide race results.

Share stationary bike data with Strava, Garmin Connect and Golden Cheetah