Mixxx is Free DJ software that gives you everything you need
Collaborative programmable music
R Package for Music Score and Audio Generation
An entire virtual orchestra in LV2 plugin format
MIDI Metronome using the ALSA Sequencer
Respin de Antix 23 orientada a la producción musical:
The Java Multitrack Audio Recording Software AudioChain
music composition and notation software, audio to midi converter
Perform dynamic tunings for realtime music.
The Java Musical Framework
Real-time audio synthesis engine and music programming language
patch editor for the E-MU Proteus 2000 synthesizer family
Java API for Musical Softwre
Open-Source Braille Music Notation Software