GPSBabel - GPSBabel converts waypoints, tracks, and routes between popular GPS receivers such as Garmin or...
GPX Editor - Load, modify and save your GPX 1.1 files.
GpsMid - GpsMid is a free, fully offline, vector based map application for your mobile phone.
gpx.studio - View, create, edit and combine GPX files online to correct your activity data or design new awesome routes.
Opentraveller - With Opentraveller place markers, draw tracks, change the background map, visualize in 3D your route and print it or export it to GPX.
GPS Track Editor - GPS Track Editor: Free Windows Application to Make GPS Tracks Better.