GPX Editor - Load, modify and save your GPX 1.1 files.
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.
GpsMid - GpsMid is a free, fully offline, vector based map application for your mobile phone.
GPSies - With GPSies you can view and download tracks which have been recorded by a GPS device.
Opentraveller - With Opentraveller place markers, draw tracks, change the background map, visualize in 3D your route and print it or export it to GPX.