Musopen is an online library classical music of music recordings and sheet music that are in the public domain.

All of the recordings on Musopen can be downloaded and or be embedded into a blog or website. The sheet music offered by Musopen is hosted by Scribd from where visitors can download or print the sheet music.

Musopen could be a good resource for practitioners/learners of music theory and music performance; visit http://www.musopen.com/ to find out more.