OK off topic, just in case someone wants to code a new GPX editor, here is my whishlist:

  • show elevation profile, at least when the gpx data has ele tags.
  • show background layers like JOSM
  • allow to split gpx track into n parts or into parts with ~m points so that the GPS can handle them better
  • easy merging of two tracks (split old track at first and last connection, replace the old part by the new part)
  • easy removement of short spikes (where the track goes like a-b-c-d-c-b-e-f…).
  • export to kml format
  • detection of steep segments : sometimes routers prefer a shorter but steeper path as shortcut instead of following the road,
    and normally I prefer to follow the road
  • hotkey to enable / disable the display of the gpx track so that the underlying background is shown. This would make it easier to see
    what type of road you are on.
  • allow to select a point in the elevation profile and zoom to that place

None of my tools allows to do all those tasks. Maybe this could be done in a new JOSM plugin?