The Coinprism wallet can be used for now.  Android wallet hasn't been tested, but Lykke is OpenAssets compatible, so in principle it should interoperate, although its not currently tested.

iOS wallet is being worked on here: https://github.com/LykkeCity/LykkeIOS
Code landing page is here: https://github.com/LykkeCity/LykkeX

Obviously pull-requests would be very welcome. NBitcoin, Coinprism and Openassets aren't very active, so contributions upstream would benefit the project.