ChordPulse is an automatic accompaniment generator, a music arranger program, a music trainer, a songwriting tool, a drum machine with bass, a metronome with chords. It is a shareware music composing application that's easy-to-use, fun and user friendly.
Here are some screenshots to illustrate the features and user interface of this application:
MidiNotate Player
Notation Composer
MuseScore
Synthesia
Virtual MIDI Piano Keyboard