Maybe it is me, and the people I have worked with, but it seems very hard to find a simple plug-and-play REDM UI.
My thought is to have a generic Ajax interface that pushes and pulls JSON to and from a Spring or Catalyst HTTP REST server, that pushes and pulls data based upon meta information contained within a database, picking up foreign and primary keys as appropriate.
Then non-UI part would take no more than a week from start to finish, but can I be bothered?