Some GPS & Mapping links

Jo Wood's GPS/Audax FAQ - excellent web page for GPS first-timers.
Claire Ashton's GPS advice
Danial Webb's GPS Library includes some audax files.

GPS Information .net big resource
GPS Passion big resource
Open Source GPS How To geeky

Francis Cooke's Garmin Menu Map and 'Living with a Garmin' articles

Desktop Mapping: Memory Map Anquet Tracklogs Fugawi OziExplorer IGN IGN / Garmin French Basemaps Garmin MapSource   ...   and latest version Update (free) **NB - latest version update to 6.14 looks like a bad idea - see my note here Metrowizz Autorouting wizard - beats the Metroguide incompatibility trap Add-on contour maps courtesy of Scottish Mountaineering Club

Online Mapping: Google Maps Multimap OS Get-a-map GMaps Pedometer Bikely MapMyRide Toporoute Routeslip GPSies Netkvik BikeHike uses OS as well as Google mapping CTC Maps good routes resource, parts need CTC membership/login

Utilities:
GmapToGPX to get GPX from Google Maps
EasyGPS simple clean-up utility, also connects GPS
GPSBabel very good file cleaner and converter, also connects GPS
GPS Visualizer online file converter
GSAK (Geocaching Swiss Army Knife) more about waypoints than about routes and tracks
WinGDB converts between Mapsource Route / Tracks
Garmin Communicator browser plugin, connects Garmin GPS
GPS Altitude Chart useful tool, requires Java.
GPS Trackmaker
GPS Utility not free, but very comprehensive
Garmin latest GPS Firmware Updates (free)