Liquidity allows you to borrow LUSD against ETH at 0% interest. Instead of paying variable interest rates, Liquidity charges a small one-time fee. LSUD is a fully backed stablecoin pegged to the US Dollar that's maintained by an algorithmic monetary policy. There is no-front end UI for Liquidity, but you can access these benefits using their Frontend list which includes companies like Zerion, Liquidity.App, DeFi Saver, and more.