Recently, zkSync launches its 2.0 testnet.
Enter the website below, you can request testing tokens from the faucet. Then you can use the testnet wallet to transfer your fund, and even bridge your token to L1 testnet.
https://portal.zksync.io/faucet
At this moment, all the applications on zkSync2.0 testnet are listed below:
https://matterlabs.notion.site/zkSync-2-0-Testnet-Applications-e38328bccda7472793024a25e26a1cac
The first application is called Trustless, you can stake your Trueth, and you could also add Trueth/Hue LP there.
https://zksync.trustless.fi/#/position
The second application is SyncSwap, which is dex. I suggest everyone should try to use it, since the experience on SyncSwap is perfect. The interaction is smooth, and the transaction speed is really fast. You can follow SyncSwap on twitter and take part in its testnet feedback event.
The next one is mute NFT protocol, you can mint your NFT there. But you have to own an Argent wallet to use this application.
The next one is also a DEX, called Mute Swith. Its function is similar to SyncSwap, but it has a lot of bugs and is very slow right now. I tried to swap USDC to DAI there, but I could not even approve USDC successfully.
https://testnet.switch.mute.io/
Sat.is is a USDC and USDT future market.
https://zksync-testnet.sat.is/
TofuNFT is a famous NFT platform which has already launched on a lot of networks, you can try trading NFT on its zkSync2.0 testnet.