Mutopia projectThe Mutopia Project offers sheet music editions of public domain classical music for free download. "... a volunteer-build Web-based collection of musical scores ... the content tends to derive from public domain editions of music from the Baroque, Classic, and romantic eras, along with many hymns and traditional/anonymous pieces ... a handful of more recent pieces appear, mostly contributed by the composers themselves, who tend to be under 40 and unpublished elsewhere." Works have been set using Lily Pond notation software.