MakerDAO

The liquidity endpoint for DeFi on Ethereum, BSC, Polygon, and more. 0x API is a professional-grade liquidity aggregator enabling the future of DeFi applications. Our smart order routing splits up your transaction across decentralized exchange networks to be filled with the lowest slippage possible. Offer competitive pricing through 0x's RFQ system. Enables free limit orders and true peer-to-peer liquidity. Access AMM liquidity that you can’t get anywhere else. Don't ever worry about adding new sources, we have it covered. Better prices, faster response times, and lower revert rates than any other aggregator on the market. Automatically create orders that can be passed directly through your smart contracts to be settled on-chain. Matcha is the global search engine for liquidity and markets that enables users to trade tokens at the best price through a world-class interface.

Aave is an open source and non-custodial liquidity protocol for earning interest on deposits and borrowing assets. Aave is a decentralized non-custodial money market protocol where users can participate as depositors or borrowers. Depositors provide liquidity to the market to earn a passive income, while borrowers are able to borrow in an overcollateralized (perpetually) or undercollateralized (one-block liquidity) fashion. At Aave, security is our top priority and we are constantly auditing and improving our protocol. The funds are stored in a non-custodial smart contract on the Ethereum blockchain. You control your wallet. Regulated and auditable by code. To ensure top notch security, Aave Protocol has had audits by trail of bits, open zeppelin, consensys diligence, certik, peckshield and certora. All audits are publicly available.

Abra is a light-weight Java persistance library for storing and retrieving Java objects in relational databases.

Scale your DApp to Polkadot with Acala, an Ethereum-compatible smart contract platform optimized for DeFi. Acala is the decentralized finance network and liquidity hub of Polkadot. It’s a layer-1 smart contract platform that’s scalable, Ethereum-compatible, and optimized for DeFi with built-in liquidity and ready-made financial applications. With its trustless exchange, decentralized stablecoin (aUSD), DOT Liquid Staking (LDOT), and EVM+, Acala lets developers access the best of Ethereum and the full power of substrate. Access DOT-based assets and derivatives, Polkadot-native decentralized stablecoin, Polkadot ecosystem assets, and cross-chain assets from Bitcoin, Ethereum and beyond. Acala’s chain is customized for DeFi and can continue to upgrade without forks to integrate new features requested from developers. For example, on-chain ‘keepers’ automate protocol execution to better manage risks and improve user experience, or transaction fees payable with virtually any token.