Decentralized Prediction Markets
Prediction markets are exchange-traded markets created to trade the outcome of events. The market prices can indicate what the crowd thinks the probability of the event is.
Gnosis
Gnosis is an open platform for creating prediction market applications on the Ethereum protocol.
Helena
Prediction markets platform for forecasting blockchain developments, events, and projects.
Omen.eth
Omen uses the Gnosis conditional token framework to give anyone the ability to create a prediction market - be it in the realm of crypto, sports, politics, entertainment, etc. Interview with Omen team.
Polymarket
Polymarket is an information markets platform, where you can bet on the highly-debated topics and earn for being right.