lilypond.org
makemusic.com
sibelius.com
finalemusic.com
musicaleditor.com
noteworthysoftware.com
notation.com
music-notation-software.com
notionmusic.com
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
jojocms.org
musopen.org
gnu.org
fsf.org
fluxbb.org
getmura.com
librecad.org
freedos.org
bonitasoft.org
pdfreaders.org
opsound.org
playonloop.com
ubuntu.com
libreoffice.org
mybb.com
notepad-plus-plus.org
ilovefreesoftware.com
gofree.com
osalt.com
reactos.org
freeos.com
freesoftwaremagazine.com
haiku-os.org
musicreader.net
sibeliusblog.com
linuxaudio.org