The Rochester Bridge Trust
- Charitable Trust owning and maintaining several crossings over the River Medway since the 14th century, including the Medway Tunnel. Includes searchable catalogue of the Trust's archives, containing administrative, financial, estate and construction recor
- http://www.rbt.org.uk/

City of Rochester Society
- Society to conserve the historic City with details of guided tours, membership and publications.
- http://www.city-of-rochester.org.uk/