JOSM

It supports loading GPX tracks, background imagery, and OSM data from local and online sources,

OpenStreetMap editor software · josm.openstreetmap.de

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What JOSM’s own pages say

What it says it doesIt supports loading GPX tracks, background imagery, and OSM data from local and online sources, josm.openstreetmap.de
Open sourceYes josm.openstreetmap.de
LicenseJOSM is open source and licensed under the GPL josm.openstreetmap.de

Each value is a quote AirStack found on the product’s own pages, read 2026-11-04. A missing field means AirStack has not found it on its pages.