Check the icons to find out what kind of tracks they have. Most of them also offer to download the tracks as .gpx
Database with more than 50,000 tracks from basically everywhere.
Dutch database with more than 2,500 tracks mainly from the Netherlands, Belgium, Germany and France.
Nice database with more than 50,000 Tracks from all over the world
Biggest database (we know of) with more than 90,000 tracks of more than 100 countries.
Database with more than 100 bike-tracks, mainly from Belgium. The site is in Dutch.
More than 80.000 biketracks from almost everywhere. Nice mapsearch!
Nice mapbased database with more than 2000 hikingtrips