Prompt Title: DeFi platforms.

DeFi, or decentralized finance, platforms are a type of blockchain-based financial platform that allows users to access financial services in a decentralized manner. Here are some popular DeFi platforms:

1. Uniswap: Uniswap is a decentralized exchange (DEX) built on the Ethereum blockchain that allows users to trade Ethereum-based tokens.

2. Aave: Aave is a decentralized lending and borrowing platform that enables users to lend or borrow a variety of cryptocurrencies without the need for intermediaries.

3. Compound: Compound is a decentralized lending and borrowing platform that allows users to earn interest on their cryptocurrency deposits or borrow cryptocurrency against collateral.

4. MakerDAO: MakerDAO is a decentralized autonomous organization (DAO) that issues a stablecoin called DAI, which is pegged to the US dollar. Users can borrow DAI by collateralizing their cryptocurrencies.

5. Curve Finance: Curve Finance is a decentralized exchange (DEX) that specializes in stablecoins, allowing users to swap between different stablecoins with low slippage.

6. Synthetix: Synthetix is a decentralized platform that allows users to trade synthetic assets, which are digital representations of real-world assets.

These are just a few examples of the many DeFi platforms available in the market. It's important to do your own research and understand the risks associated with using DeFi platforms before investing your funds.