Mega Menu Pro ‑ Drag & Drop

App is very easy to set up, really customisable on the backend. Their service is excellent, it wasn't showing on the front end, they made it show and then spent several hours over the next couple of weeks sorting issues with the rendering, scrolling etc. Really good backup, would recommend. I even offered to pay them for their time, and they said no this is free backup... can't fault them. :)