Delphy is a mobile platform for prediction markets built on Ethereum as a DApp. In fact, it is a light Ethereum client running on mobile devices. Its born decentralization ensures that prediction markets are hard to manipulate or shut down, and there is no need to trust one single entity.
HappyCoin is a digital currency designed for use of peer-to-peer technology to operate with no central authority; managing transactions and issuing money is carried out collectively by the network.