Recent Developments in Superconducting Deflecting-Mode Cavities

The last few years have seen significant activities directed towards the development of superconducting cavities operating in the deflecting mode. The stringent requirements imposed by new requirements necessitated the development of new cavity geometries. Proofs-of principle cavities have been fabricated and tested, and have shown excellent properties. Prototype cavities and cryomodules for operation and testing with beam are now under development as part of a world-wide collaboration. The status of these activities is being presented.