RouteConverter is a free, user friendly GPS tool to display, edit, enrich and convert routes, tracks and waypoints. It helps me to plan routes and consolidate tracks and I hope it could help you.
The latest version 2.8 from 17th August 2012 offers a lot of new features and improvements.
If you like RouteConverter please consider to donate or to help with the further development.
This is how RouteConverter looks like: