International Music Score Library Project
The IMSLP believes that public domain music scores should be easily accessible for everyone. They have created a Wikipedia-like music library to provide classical music scores free of charge to anyone with internet access, with several other projects in planning. It claims to have 85,000 scores, or parts for nearly 35,000 works, with several thousand being added every month. The site has recently begun adding recordings. Through a partner site, it also offers low-cost, on-demand printing.
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