Uniswap
Uniswap's VolatilePair Hook is live on Robinhood Chain, opening with an ETH/USDG pool that users can provide liquidity to directly from the Uniswap Web App. The hook sets a fee for each side of a trade and adjusts both as the market moves, letting LPs keep more of the value they create.
VolatilePair first launched on Ethereum mainnet with an ETH/USDC pool, with developer docs live via Uniswap Builders. It joins StablePair, Permissioned Pools, and LitePSM in Uniswap's v4 hook lineup, with more hooks on the roadmap.