In the field I use a Garmin Oregon 700 (which replaced the 400t model and an earlier Greko) and different cameras for photo mapping. I usually try to improve bicycle routing (including corresponding infrastructure like ice cream parlors) as well as hiking paths. I also contributed to Humanitarian OpenStreetMap tasks.

The different profiles of my Oregon are currently set up to display different routable maps like these:

• Freizeitkarte
• OpenTopoMap
• RadReiseKarte (now defunct)
• Johannes Formann’s cycle map (now defunct)

All of these osm based maps have some nice features that work well (or even great!) for walking/hiking and cycling as well as driving a car.

I recommend Organic Maps on your Android or iOS smartphone as a replacement for map data from Google or Apple.

Continue reading in the osm wiki.