Top Link Tips

Maps:
http://what3words.com
http://www.radroutenplaner-bw.de/ar-rrp-nvbw/de/alpregio.jsp#tpdt=cycling&tab=TourplannerTab (3D Tracks)

QR Code:

http://research.swtch.com/qr/draw QR Code mit Bild

http://www.visualead.com/qr-code-generator/5a111dbef11384cf14b450edc1d72a872964749/

3D modelling:
http://www.shapeways.com
https://www.shapeways.com/creator/?li=nav - easy tools
http://sourceforge.net/projects/stl4su/ - stl Plugin Sketchup