This tool can be used to parse an OpenStreetmap .osm file, possibly saved from josm and write all nodes with a fixme tag to a GPX file.
This GPX file can then be used on a GPS Receiver or with OSMAnd.
./osm-fixme-to-gpx -i markers.osm -o markers.gpx
apt-get install libgetopt-long-descriptive libxml-treepp-perl