ARiADA Project: Researches composition strategies for electroacoustic music.
Aspire - Music MasterWorks: [Win] Description and order information of this voice-to-note composing software.
AudioMulch: Interactive musician's environment offers music composition by sound synthesis and "contraptions".
Chord Arranger Pro: Creates styles from any MIDI file and is able to identify chords and convert song measures into style parts.
Compo: Composition system based on common LISP, generates MIDI and scores.
ComposerTools.Com: Free on-line tools including 12-tone row analysis and pitch class. Also "MusicGraph" a tool for graphing music across dimensions.
Drumsite: Drum track creation tool, supports multiple samples and effects.
Frameworks and Environments: Academic paper defining data structures for general concepts of composition, sound synthesis, networks.
GrooveLab: Make your drum loops online.
Hard Note JUMP: Streamlined MIDI sequencer that focuses on composition rather than audio production. Demo available.
Ixi Software: Prototypes and apps for composition of experimental music.
Pymprovisator: For jazz. Set song parameters and program generates MIDI file with adequate accompaniment. Freeware.
QuantumPortal: Free software "Blending algorithmic techniques with contemporary Music Theory to "air brush" compositions."
Rhythm Rascal: Create drum tracks using any sample WAV files as drum sounds. Flexible, although designed mostly for Rock and Metal.
SmartSound Software, Inc.: Sonicfire Pro 4 with Mood Mapping, music scoring software, and royalty-free music for video productions.
Swar Systems: Create music using Indian melodies and scales. Supports up to 8 instruments.
TaalMala and SwarMala: Compose Taal (loops) with Tabla and Pakhawaj (Indian drums). Export to WAV or MP3. Also offers the SwarMala sequencer.
The Palette: Melody composing tool uses composition and harmony theory to help composers develop phrases, sentences, periods, and motifs.
Virtual Studio Systems: Offers Lyricist and TrackNotes for musicians, songwriters, and home recording.