Geosetter - GeoSetter is a freeware tool for Windows (requires Internet Explorer 10 or higher) for showing and changing geo data and
gpx.studio - View, create, edit and combine GPX files online to correct your activity data or design new awesome routes.
Geotag - GeoTag is a freeware tool for Mac for showing and changing geo data of image files (e.g.
GPX Editor - Load, modify and save your GPX 1.1 files.
Houdahgeo - With HoudahGeo you may "pin" photos to locations where they were taken.
GPS Track Editor - GPS Track Editor: Free Windows Application to Make GPS Tracks Better.