RouteConverter is described as 'displays, modifies, enriches and converts GPS data between over 75 formats' and is an app in the Travel & Location category. There are more than 10 alternatives to RouteConverter for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Windows Mobile. The best alternative is GPS Track Editor, which is free. Other great apps like RouteConverter are QMapShack (Free, Open Source), Wikiloc Outdoor Navigation GPS (Freemium), QLandkarte GT (Free, Open Source) and GPSBabel (Free, Open Source).
Bt747 allows for configuring MTK/MTK2 based GPS data loggers (GPS trackers) and downloading track data (GPS logs) to your PC. It can convert and export logs to various formats, geo-tag pictures and upload A-GPS data to the GPS device.
KMLCSV Converter is a free open source software that enables you to convert KML file to a formatted CSV file, and vice versa. This CSV file can then be uploaded into your Garmin GPS by using Garmin POI Loader, which can be downloaded for free.