Ethereum L2 blockchains

• Optimism (Ethereum): Base, Unichain
• Arbitrum (Ethereum)
• Polygon (Ethereum)
• zkSync
• Starknet (Ethereum)

Related

• Lighting Network (Bitcoin)
• Rollup
• ERC-4337: Account Abstraction Using Alt Mempool
• EIP-1559: Fee market change for ETH 1.0 chain

See also

• Layer 2, Optimism, Starknet, Base, sequencer, Rollup, Validium, Polygon, Ethereum scaling solutions, Ethereum L2 blockchains