myTour is a tool for creating free, personalised guided tours. Using GPS, the iphone app detects the user’s current position and supplies information whenever they near a stop of the tour. (Thanks for this one, Tim.)
Where GPS isn’t available, you can print out posters with QR Codes and hang them up at every stop – tour takers use these codes to access information.
To create your own tour, go to www.mypersonaltour.com.