Too Long; Didn't Read
Aave is an open-source liquidity protocol for earning interest on cryptocurrency deposits and borrowing assets. Compound is an autonomous interest rate protocol that allows users to earn interest on and borrow cryptocurrencies. Yearn.finance uses automation to help users maximize their profits from yield farming. Chainlink is a decentralized oracle service that allows DeFi investors to gain access to data from outside. Uniswap has quickly become a leader in decentralized finance and has a strong governance structure that enables community ownership.