Musescore.org

Makemusic.com

Sibelius.com

Finalemusic.com

Musicaleditor.com

Noteworthysoftware.com

Notation.com

Music-notation-software.com

Notionmusic.com

Lyx.org

Nvu.com

Notepad-plus-plus.org

Kompozer.net

Jedit.org

Avidemux.org

Kdenlive.org

Scintilla.org

Jubler.org

Openmovieeditor.org

Openshotvideo.com

Editra.org

Texniccenter.org

Pinta-project.com

Jahshaka.org

Kinodv.org

Goldwave.com

Wavosaur.com

Music-editor.net

Goplayalong.com

Drumscore.com

Noteflight.com

Scorio.com

Songsnote.com

Readsheetmusic.info

Subsonic.org

Getsongbird.com

Songbirdnest.com

Sbooth.org

Vorbis.com

Tomahawk-player.org

Clementine-player.org

Hydrogen-music.org

Atunes.org

Musicreader.net

Sibeliusblog.com

Bean-osx.com

Thingamablog.com

Emeraldeditor.com

Wave-editor.com

Linuxaudio.org