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
Augur is a decentralized oracle and peer to peer protocol for prediction markets.

Gnosis
Gnosis is an open platform for creating prediction market applications on the Ethereum protocol.

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.

PlotX
PlotX is a cross-chain prediction market protocol that enables crypto traders to make crypto-asset price predictions in hourly, daily & weekly time frames.

Polymarket
Polymarket is an information markets platform, where you can bet on the highly-debated topics and earn for being right.