According to the official link of the project ecosystem, I will give you the list of important Dapps below:

📚Ecosystem: 👉 https://base.org/ecosystem

🌉  Native bridge: ↙️↙️↙️

https://bridge.base.org (⚠️ Withdrawal process may take 7 Days )

🌉 Third-party bridges: ↙️↙️↙️

https://portfolio.metamask.io

https://stargate.finance

https://www.layerswap.io/app

https://app.xy.finance

https://www.orbiter.finance

https://www.bungee.exchange

https://jumper.exchange

https://app.omnibtc.finance/swap

https://app.hop.exchange

https://app.rhino.fi/bridge

https://app.beamerbridge.com

https://minter.merkly.com/gas

https://owlto.finance

https://dapp.chainge.finance

💰 Swap & liquidity: ↙️↙️↙️

https://baseswap.fi

https://app.zkex.com/trade

https://app.horizondex.io/swap

https://matcha.xyz

https://layer3.xyz/swap

https://app.xy.finance

https://app.uniswap.org

https://app.paraswap.io

https://base.izumi.finance/swap

https://www.sushi.com

https://base.dex.guru

https://app.odos.xyz

https://app.openocean.finance

https://app.balancer.fi/#/base/swap

https://app.slingshot.finance

https://app.mav.xyz

https://base.kokonutswap.finance

🌆 NFT: ↙️↙️↙️↙️

https://zora.co

https://mint.fun/feed/trending

https://element.market/base

https://opensea.io

https://zonic.app/explore

https://basepaint.xyz/gallery

https://www.basednfts.co

https://onchainsummer.xyz/trending

🤝 (Lend&Borrow): ↙️↙️↙️

Aave: 👉 https://app.aave.com

Timeswap: 👉 https://app.timeswap.io

Compound: 👉 https://v3-app.compound.finance/?market=usdbc-basemainnet

💰Donate: 👉 https://app.endaoment.org

⚙ Deploy contract: 👉 https://app.atlaszk.com/ide

⚙ Deploy token: 👉 https://tokepad.xyz/create

🌫 Deploy Nft: 👉 https://nfts2me.com/app

🧿 Galxe: 👉 https://app.galxe.com/quest/base

🏛 Guild: 👉 https://guild.xyz/buildonbase

🔍Check wallet activity:

🌐 https://zkswap.finance/zkflow

🌐 https://zksync.netlify.app/?address=