The free art movement is the practice of artists leaving art in public places as street art, as well as being free for the public to remove and keep. The artwork is usually tagged with a notice stating it is free art, and either with the artist's name or left anonymously.
The movement was reinvigorated by British artist My Dog Sighs coining the term "Free Art Fridays" and actively participating in the movement, which has since spread internationally. Clues to the location of artworks are sometimes left on social media to combine treasure hunting with art. 
The movement is distinct from the free culture movement as the artist retains full copyright for the work.