Here is a running list of interesting protocols. Just because a protocol is listed here does not mean that I support or suggest it. It ONLY means that I find it interesting. Do your own research and only invest an amount that you are willing to lose.
Easiest way to trade and earn with pegged crypto assets

Earn yield on cryptoassets with Defi's first structured product protocol

Defi's Options Protocol

Asset management for a Defi world

Open source, non-custodial liquidity protocol

Yield Aggregator

Protect all crypto assets and earn profits in exchange for coverage liquidity
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Decentralized lending protocol

Decentralized trading platform that can create and trade any synthetic asset

Diversified crypto index products

Liquidity protocol that enables automated, decentralized exchange

Algorithmic, autonomous interest rate protocol

Swap, earn, stack yields, lend, borrow, leverage all on one decentralized, community driven platform

On-chain Asset Management

a Decentralized Exchange on ETH, biggest AMM on ETH
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a Decentralized Exchange on BSC, biggest AMM on BSC

Crypto asset liquidity hub with decent Yield opportunities

Assets reflected on the blockchain

A leverage yield farm on Curve, Balancer, Sushiswap, and Uniswap

A savings account with high yield on the terra ecosystem
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Dapp that creates on-chain liquidity

Boosted Curve staking
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Interest rate volatility risk mitigation using debt-based derivatives

A passive savings account within Defi
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Automated portfolio manager and trading platform

Yield aggregator
Multi-chain DEX (decentralized exchange)

A community-run protocol for initiating and managing pooled capital on the blockchain
The first stablecoin that earns a yield while it’s still in your wallet

Earn high yields on stablecoin loans and borrow capital without collateral