Musopen has been around a while, but I just found out about this awesome aspect of it. There is a ton of music and scores available already, but if there is something you’d really like to see or have available you can bid to have it performed and recorded. Seriously! Here’s how it works:
“Decide how much you would be willing to pay for a piece of music to be in the public domain (copyright free). We will combine your donation with others who want the same piece then find a professional to record and donate the work then add it to the website.
Together, all our small donations can be combined to contribute a great deal of new music.
On the left of each bid you will find an icon. Please feel free to embed these widgets on your website or blog to help raise money for the piece you want.”