UNISWAP

24/01/22
Legendary and father of all Decentralized Exchanges (DEX). Now support networks: Ethereum, Polygon, Optimism, Arbitrum. This is UNISWAP PROTOCOL: "Uniswap is an automated market maker. In practical terms, it is a collection of smart contracts that define a standard way to create liquidity pools, provide liquidity, and swap assets". This is teh first DEX. Described also as: "Swap, earn, and build on the leading decentralized crypto trading protocol." "The Uniswap Protocol is a public good owned and governed by UNI token holders.". "The Uniswap community is an ecosystem of users, developers, designers, and educators." But it has a list of fulltime jobs;) "The Uniswap Protocol and the Uniswap Interface were developed by Uniswap Labs." Oh, ok. "How do I use the Uniswap Protocol? To create a new liquidity pool, provide liquidity, swap tokens, or vote on governance proposals, head over to the Uniswap Interface and connect a Web3 wallet. Remember, each transaction on Ethereum costs Ether (ETH). For a more detailed walkthrough, check out our Help Guides."

Lyra Finance

01/02/22
AMM (automated market maker/Swap protocol)for trading options on Ethereum L2 - Optimism. Pls. advanced traders level only."Lyra is an options trading protocol accessing the scalability of Layer 2 Ethereum to provide a robust, lightning-fast and reliable trading experience."(...) "Our Mission To build an open protocol for trading options → No gatekeepers No rent-seekers Owned by the community"

Curve.fi

06/02/22
Complicated mix of DeFi and DEX. You can gain high APR by being liquidity provider or exchange stablecoins with good rate. "The easiest way to understand Curve is to see it as an exchange. Its main goal is to let users and other decentralised protocols exchange stablecoins (DAI to USDC for example) through it with low fees and low slippage. Unlike exchanges out there that match a buyer and a seller, the behaviour of Curve is different, it uses liquidity pools like Uniswap. To achieve this, Curve needs liquidity (tokens) which is rewarded by those who provide it."."Centralised exchanges tend to have high fees which are problematic for those trying to move from a stable coin to another. As a result, Curve.fi has become the best place to exchange stable coins because of its low fees and low slippage."

PanCake Swap

17/02/22
Game-looking DEX. Exchange tokens minted on Binance (Side)Smart Chain including BNB, CAKE, BUSD, ETH . But ETHs are not true ETHs, this is BSC, centralized sidechain of Ethereum. So this is decentralized exchange on centralized network. Not true crypto (trillema not solved), but looks nice.

dYdX Exchange

30/06/22
Modern decentralized crypto market (DEX) but with non-custodial operations and use of own Layer 2 ETH side blockchain for lower TXs fees. Web3, MetaMask or other wallet login, no KYC. Thus it mix CEX & DEX characteristic. Competitions, Governance DAO, developer support. New generation of DeFi and exchange. Liquidity Pool on community portal, where You can stake and earn rewards for contributing to dYdX exchange liquidity.