StableTez is a series of smart-contracts managing hard-backed stablecoins on Tezos, like USDtez (USDtz), ETHtz, BTCtz, and much more. Tezos-first, Tezos-native; Tezos DeFi dapp programmable (and optimized).
Tezex (Tezos Exchange) is a decentralized non-custodial swap protocol for between Tezos (FA-standard) tokens, as well as a cross-chain bridge between Tezos tokens and other-chain (e.g. Ethereum).
TezFin (Tezos.finance) is a decentralized lending platform to expand the Tezos DeFi ecosystem. TezFin's Automated Interest Rate Maker sets borrowing and lending rates as a function of supply and demand.