I'm looking for a simple yet flexible solution for a client whom owns retail stores and wishes to white label a floor planner so that new franchisees can build their own store layouts from within a back-end system.

Ultimately I'd love to have HTML5 + JavaScript but would consider a flash based solution if need be.

I've found a few SAAS floor planning services but not heard anything upon my requests for a white labeled partnership.

Any suggestions would be greatly appreciated.