https://aave.com/

Aave is a decentralized finance (DeFi) protocol that allows users to lend, borrow, and earn interest on cryptocurrency assets. It was launched in 2017 under the name ETHLend, but was rebranded to Aave in 2018.

One of the unique features of Aave is its use of a "flash loan" mechanism, which allows users to borrow funds without collateral as long as the loan is repaid within the same transaction. This has opened up new possibilities for arbitrage and other trading strategies in the DeFi space.

Aave also uses a system of "aTokens" to represent the value of assets deposited into the protocol. These aTokens can be traded and used as collateral for borrowing other assets, allowing for more flexibility in managing one's cryptocurrency holdings.

Overall, Aave has become a popular platform in the DeFi space due to its innovative features and user-friendly interface.