Drew Webber (mcdruid) is a UK Drupal developer, PHP programmer and linux sysadmin. This is his website.
I have an Ultrasport NavRun 500 which is quite a decent GPS watch for running, but has a couple of software limitations - especially from the point of view of a linux (or mac) user. It uses a proprietary tkl file format which doesn't seem to be natively supported by GPSBabel. Unlike at least one Garmin GPS watch I've looked at, it doesn't mount as a storage device in linux; I'm pretty sure the only way of retrieving data from the watch is via the Windows-only GPS Master software, which includes the USB driver.
 Shortly before ultrasport broke their site and made the pages for the NavRun disappear, a mac version of the GPS Master software was released, so it's not totally true to say it's Windows-only.
...and since then I've found the crane_gps_watch project on github. Once compiled and installed (clear instructions are provided), this seems to work nicely; I'm now able to retrieve new data from the watch in .tcx format from within linux, which is great! [/edit]
The GPS Master software is not bad - it uses Google Maps, has an okayish interface, and perhaps most importantly can export data in a few different formats (pth, kml, gpx, nmea and csv).
Recently I wanted to upload a lot of old GPS data (details of nearly 200 runs) to strava, and it seemed that in order to do so I needed to convert all of my data from the proprietary tkl format to gpx. Unfortunately it looks like the only option to do this conversion in the GPS Master software is as individual exports - one file at a time. If I wanted to convert all 200ish files, there was going to be a lot of manual clicking.
As a dedicated lazy developer I looked into my options for automating this process, and soon came across AutoIt which is a "freeware BASIC-like scripting language designed for automating the Windows GUI [...which...] uses a combination of simulated keystrokes, mouse movement and window/control manipulation". After a bit of looking at the excellent AutoIt examples and some messing around, I had a basic working script which could export the data from several runs into individual gpx files using the GPS Master software.
I've since refined it a little, added a couple of dialogs at the start to prompt for user input, and it's now a fairly usable little tool. The gpsmaster_export.au3 script (and both a 32bit compiled executable and 64bit exe) are available from my github account. I've tested it in WinXP and Win7.
The basic workflow to use this would be:
It's far from perfect, but it's already scratched my original itch. I'd be very happy if other people find it useful - feel free to leave a comment either way.