Peter Billam became in 1998 the first composer to sell scores on-line, direct from composer to performer. You may now freely download, in PDF format, the scores of a range of Peter Billam's musical compositions and arrangements for piano, voice, recorder, flute, guitar, brass, strings and various chamber ensembles.
Muscript free music-typesetting in New ! both Perl and Lua
MIDI a collection of tools for handling MIDI files