Blocknet is a cross-chain protocol for inter-chain transactions and a decentralized exchange. It is primarily focused on connecting blockchain networks, but is also developing a decentralized exchange to enable trade digital assets across separate blockchains. It is meant to connect the growing number of blockchain projects and make them inter-operable. Blocknet uses a Proof-of-Stake (PoS) consensus mechanism that has three different types of nodes to verify transactions. The network is powered by the BLOCK coin.

DEW is a decentralized exchange that allows users to trade blockchain-based assets as well as stocks, futures, and other securities. Asset transfers are executed according to rules established in smart contracts, and a chain-based clearing mechanism ensures transparency. The DEW network, and exchange, is powered by the Ethereum-based DEW token.

Newdex is the first EOS based decentralized exchange. It's built on the EOS main chain and uses an off-chain matching mechanism to pair buyers and sellers. Newdex was hacked in September 2018, and lost around $58,000 worth of cryptocurrencies. Trading fees are 0.1%.