Load map API into Processing? (Leaflet.js equivalent)

Dear all,

I am using the excellent library UnfoldingMaps to easily load map tiles API (Google, ESRI etc.) but I was wondering if anyone was aware of another library that would able to load other more modern map API especially the one made by Here.com or MapBox.

The Leaflet.js plugin seems very promising but do we have the equivalent in Java / Processing?

Best regards,