None I know of. I have one for iOS named Macchiato [macchiato.10centuries.org], as does named Ristretto. is working on a few. of course has Cappuccino [chat.10centuries.org] and the admin interface. And has Blurbybot on Telegram (I don't know any URL for that) and I think also an integration for whatever is running Monkeystew. And had a client at some point as well I think?