Over the last few months i’ve been working for a company from Isreal giving feedback, suggestions and testing MIDI exports on a new web application. Essentially you will be able to select a key, instruments, tempo, scale and complexity then press a button and the web application will create new original music for you.
This is by no means going to write a Rockabilly or Rock N Roll song for you but the real benefit of the app will be the melodic/chord ideas that it can come up with. This could provide a nice starting point if you get writers block.
I will let you know more on this when it is coming up for release but it certainly will be a useful tool for any musician. I can see it is likely more useful for those writing production music but it certainly can provide some ideas for Rockabilly musicians too.