I've been developing a tool called Catalist that has Kanban-like functionality built right into all our checklists since each item has states of to do, doing, and done. If you need more states (i.e. more steps beyond 3 like Trello), we offer pipelines that do just that. We believe having both these systems in our product allows our customers to speak a common language when it comes to priorities. We would definitely be open to allowing you to host Catalist directly on premises. Happy to give a demo, all you need to do is sign up and I'll contact you.

Catalist [http://www.catalist.me]