The NAVIGON series of navigation apps for your Windows Phone was recently updated and to celebrate things, they are also on sale through October 31, 2012.
Along with the customary performance tweaks, the version 4.3 update brings route planning to both NAVIGON USA and NAVIGON Europe. It's a nice feature to allow you to plan a multi-stop trip ahead of time and avoid having to re-enter your destination after every stop.
Both versions of NAVIGON makes use of downloadable, offline maps to reduce the dependency on data while traveling. If you wander off into an area with poor reception, you won't have to worry about maps or routes being lost. Adding route planning only enhances the navigation app's capabilities.