Interested in music in the public domain? There is a lot out there, including Archive.org, Opsound and etree.org. There is also a new project for online collaboration of music, sounds, loops and samples in the public domain called Free the Sounds. If you are a musician and want to share and collaborate, this might be a good place for you to get moving!
Are you a world traveler? Ever wanted to stay on a hostel sailboat? It's not free, but it is darn close! Hostel Happy has a sailboat for hosteling adventures in the Caribbean and Mediterranean... as close to free as you can get for this type of styling world travel adventure!