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.
TrueFeedBack is a survey/bounty platform where companies, institutions, academicians or other interested parties can create surveys or bounties. Users can participate in these surveys and bounties, get incentives for participating and stay anonymous all the time.