OpenStreetMap
Up to now I've been using a very old laptop with Linux, TangoGPS and a USB GPS dongle to do mapping and navigating. Which works well in a car with the laptop on a seat and the dongle stuck to the roof, but it's not very practical for walking streets and fields, so I've decided to treat myself and upgrade to a Garmin eTrex Legend HCx.
Did someone mention this is addictive?
Discussion
Comment from Biogenesis_ on 8 June 2009 at 11:15
Great choice on the HCx, mine has been very faithful for the last year.
Just be warned that the rubber around the outside edge will come un-glued if the unit gets too warm. Mine came off last Summer (after about 8 months of ownership, haven't bothered getting it repaired under warranty) but "stays on" so long as the weather doesn't warm up too much. Wouldn't want to trust the waterproofing anymore.
Other than that though it's an awesome unit.
And yes, I'm still waiting for somebody to start a local OSM'ers Anonymous group in my area.