MuseScore is a free cross-platform WYSIWYG music notation program, that offers a cost-effective alternative to professional programs such as Sibelius and Finale.
You can print beautifully engraved sheet music or save it as PDF or MIDI file.

Some highlights:

  • WYSIWYG, notes are entered on a "virtual note sheet"
  • Unlimited number of staves
  • Up to four voices per staff
  • Easy and fast note entry with your keyboard, mouse, or MIDI keyboard
  • Integrated sequencer andFluidSynthsoftware synthesizer
  • Import and export ofMusicXMLand Standard MIDI Files
  • Available for Windows, Mac and Linux
  • Translated in35 languages
  • GNU GPL licensed