Hitchwiki is a collaborative project to build a free guide for hitchhikers. There you can find thousands of articles on places and their possibilities for hitchhikers and other tips in [english], [french], [german], [spanish], [finnish], [portuguese], [polish], [chinese], [bulgarian] and [russian] language.
See also WikiVoyage, TravellersPoint, WorldSixtySix, WikiTravel, OpenGuides.