Pymprovisator is a program for jazz musicians. Jazz music is based on improvisation and this program is intended to help musicians to improvise. The user sets the song parameters and the program generates a MIDI file with an adequate accompaniment. It emulates the program Band in a Box from PG Music. You can think of it as the electronic version of the books/CD from Jamey Aebersold.
FluidSynth is a real-time software synthesizer based on the SoundFont 2 specifications. It can read MIDI events from MIDI input devices or files and render them to an audio device using SoundFont instrument banks. It can also play MIDI files. Other features include real time effect control and a powerful API for embedding FluidSynth in other programs.
Rumor is a realtime monophonic (with chords) MIDI keyboard to Lilypond converter. It receives MIDI events, quantizes them according to its metronome on the fly, and outputs intelligently handwritten-like corresponding Lilypond notation. Tempo, meter, key and other parameters can be set via commandline options. Rumor can use ALSA/OSS or emulate MIDI input with computer keyboard. It is scriptable with Guile. It has been tested on several major J. S. Bach organ pieces (see links to Mutopia in the documentation).
Traktor DJ Studio is a powerful and versatile software solution for professional DJ mixing, live remixing, and mix recording using tracks in MP3, WAV, AIFF and CDDA format. It exceeds the possibilities of traditional DJ equipment by implementing a vast range of mixing features that only software can provide. This includes graphic waveform displays, tempo recognition and automatic synchronization, up to 10 cue points and 10 tempo-precise loops per track, and a track database with an ultra-fast search function.