Melody Generator - Randomly generated MIDI melodies you can use for free
AudioCipher - AudioCipher is the text-to-midi DAW plugin that transforms words into MIDI melodies and chord progressions.
Captain Chords - Write chord progressions in your favorite DAW
Melodya - Melodya - motive editor and melody generator
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.
RapidComposer - MusicDevelopments RapidComposer: Music Prototyping and Automated Composition Software