RouteGadget is a Web application for drawing and comparing orienteering routes. Many SOS events have uploaded results to this service so you can add your route choice (manually or by uploading a GPS track) and see the routes taken by others.
Go to the BASOC RouteGadget site and view the event archive.
You can watch a couple of videos that show how to:
There is also a RouteGadget User Guide containing lots of information about RouteGadget and instructions for organisers/planners on uploading the results and maps etc.