Orbiter Finance is a decentralized cross-rollup bridge for transferring Ethereum native assets.  It offers low-cost and almost instant transfers. Orbiter supports cross-rollup transfers (e.g. ETH, USDC, USDT, and DAI) between Ethereum, StarkNet, zkSync, Loopring, Arbitrum, Arbitrum Nova, Optimism, Polygon, BNB Chain, ZKSpace, Immutable X, dYdX, Metis and Boba. In addition, the Maker has launched on testnet and you can become a Maker to provide liquidity soon.