[OSM-talk] Utilities to analyze / report statistics / make neat maps based on GPX data

[Ævar Arnfjörð Bjarmason]

I've recently been given access to daily per-day GPS dumps for a bunch
of GPS devices. I'd like to produce some statistics from these GPX
files on a daily basis, like how many kilometers each device traveled,
charts per device / group of devices and so forth.

Is there any GPX analysis software (preferably text based) that would
make a good basis for this sort of thing?