Ethereum

Aave: Known for its non-collateralized lending protocol, Aave allows users to borrow and lend cryptocurrencies without the need for collateral. It also supports stablecoins and other assets.
Uniswap: A decentralized exchange (DEX) that facilitates the trading of cryptocurrencies and tokens. It operates on the Ethereum blockchain and has become one of the largest DEXs in terms of trading volume.
Compound: Another prominent lending protocol, Compound allows users to lend and borrow a variety of cryptocurrencies. It's known for its high liquidity and competitive interest rates.
MakerDAO: A decentralized autonomous organization (DAO) that manages the DAI stablecoin. MakerDAO allows users to create DAI by locking up collateral in the form of other cryptocurrencies.
SushiSwap: A decentralized exchange and liquidity provider that has gained popularity due to its innovative tokenomics and community-driven governance model.