zkPorter: zkPorter is a Layer 2 solution that combines zk-rollups with sharding, aiming to significantly increase Ethereum's throughput while maintaining security.

Cartesi: Cartesi is a Layer 2 infrastructure that enables complex computations to be executed off-chain while ensuring the validity and security of results on-chain.

zkTube: zkTube is a Layer 2 scaling solution that utilizes zk-rollups to enhance Ethereum's scalability, allowing for faster and cheaper transactions.

Valencia: Valencia is a Layer 2 solution for the Avalanche blockchain, focusing on scalability and interoperability between different blockchain networks.

Golem: Golem is a decentralized computation network that implements Layer 2 scaling solutions to enhance the speed and efficiency of distributed computing tasks.

Plasma: Plasma is a Layer 2 framework that aims to improve Ethereum's scalability by creating child chains that can process transactions more quickly and at lower costs.

Secured Finance: Secured Finance is a Layer 2 solution for decentralized finance (DeFi) applications, focusing on scalability and privacy for DeFi transactions.

Connext Network: Connext Network is a Layer 2 scaling solution for Ethereum that utilizes state channels to enable fast and low-cost transactions.

Fusion: Fusion is a Layer 2 solution that focuses on enhancing blockchain interoperability and scalability through its innovative Time-Lock feature.

Skale Network: Skale Network is a Layer 2 solution for Ethereum that offers sidechains to improve scalability, allowing developers to deploy decentralized applications with higher performance.