Captain Chords - Write chord progressions in your favorite DAW
Melody Sauce - Melody Sauce VST Plugin is the first product from Evabeat, making melodies with your DAW of choice has never been easier or more fun.
Odesi - ODESI is a music sketchpad that exports your projects to Audio and MIDI.
Melody Generator - Randomly generated MIDI melodies you can use for free
Cthulhu - VST MIDI-FX plugin for harmonic inspiration
Plugin Boutique - Inspirational MIDI effect that makes finding chords and progressions intuitive and fun