GPSBabel

GPSBabel is an application that can help you convert waypoints, tracks and routes between GPS receivers and mapping programs from one format to another.
It sports a clean interface that allows users to perform several actions on the go. Thanks to its intuitive layout, it doesn’t take a lot of time to get used to working with this tool.
You can select to synthesize short names, enable character set transformation, preview the maps in Google Maps, and view debugging diagnostics.
The application provides a comprehensive list with the map file formats that are supported, and you can enable or disable the selected items. It supports the following formats: TRL, VPR, MMO, BCR, TWL, SSZ, RWF, SRT, OVL, DAT and many others.
Unfortunately, you cannot drag and drop the items directly into the main, and you should add them by using the built-in browse button.
The application bundles some built-in filters for tracks, waypoints, and routes and tracks. The track filters can be customized by adding a title, merging or splitting the files, and selecting the GPS fixes, while the waypoints filters can get you details about duplicates, radius and position parameters.
Additionally, you can select the data type, such as routes, tracks, and waypoints, and the conversion method (e.g. track to waypoints, routes to tracks), as well as swap coordinates.
To sum things up, GPSBabel is a handy application that can help you convert a wide range of waypoints, tracks and routes from one format to another. Thanks to its overall simplicity, it appeals to beginners and experts alike.