On Visit Sights you will find recommendations for free self-guided sightseeing tours in many cities around the world.
Freetour Alternatives
Freetour is described as 'The Free Tour concept has been around for quite a while but is a relatively new way to discover cities compared to the traditional tour concept, which of course has a much longer legacy' and is an website. There are 1 alternatives to Freetour, not only websites but also apps for. The best Freetour alternative is Visit Sights, which is free.