Yes, OceanONE is part of Mixin Network and builds on Mixin Network and is open source now, which means everyone can build own exchange based on OceanONE. You see we have Mixin Messenger and OceanONE powered by Mixin Network and You can think those two are demos build on Mixin Network.

There are a lot of possibility on Mixin Network, except messenger app and exchanges.