Melodya was released by MusicDevelopments a few days ago. You can order is for $39 during the introductory offer, until May 25, 2020.
Melodya is an advanced motive editor and melody generator which is simple to use but at the same time it offers many detailed settings for deeper control. It not just creates new melodies, it can also mutate existing melodies in different ways. The generated melody can be freely edited.