GPSBabel - GPSBabel converts waypoints, tracks, and routes between popular GPS receivers such as Garmin or...
gpx.studio - View, create, edit and combine GPX files online to correct your activity data or design new awesome routes.
BT747 - Software for tracking GPS Data Loggers: download and convert data (HTML, GPX, KML, KMZ, ...), geotag and configure. For PC, Mac, PDA, Mobile Phone. USB, Bluetooth
GPX Editor - Load, modify and save your GPX 1.1 files.
GPSies - With GPSies you can view and download tracks which have been recorded by a GPS device.
GpsPrune - GpsPrune is an application for viewing, editing and converting coordinate data from GPS systems.