• Musopen
  • Mainly classical music.
  • Allows to search through different time periods.
  • Very clear licenses, if any.
• Free Music Archive
  • Wide array of Free to use music.
  • Huge variety of styles, easy to search through.
• Archive.org 78 RPM section
  • Consolidated list of awesome music from the early 20th century.
• Open Music Archive
  • Out of Copyright music.
  • Some really great soul, pop music to sample.