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.
Augur is a decentralized oracle and peer to peer protocol for prediction markets.
Gnosis is an open platform for creating prediction market applications on the Ethereum protocol.
Polymarket is an information markets platform, where you can bet on the highly-debated topics and earn for being right.