StarkWare is a ethereum layer-2 scaling protocol and one of main zk-rollup solutions. Starkware builds StarkNet( a permissionless decentralized ZK-Rollup) and StarkEx(a standalone permissioned Validity-Rollup）, both layer-2 scaling solutions for Ethereum using zero-knowledge rollup technology.
Arkreen Network is a Web3-powered infrastructure for globally-distributed renewable energy resources. It enables the connection and monetization of carbon-reduction applications. By using Web3 and IoT/Blockchain as the base infrastructure, Arkreen is creating a network to economically collect trusted, distributed, renewable energy-generation data and convert it into a Renewable Energy Certificate (REC). This allows users in the ecosystem to participate in creating their own carbon footprints.
EigenLayer is a protocol built on Ethereum that introduces restaking, a new primitive in cryptoeconomic security. This primitive enables the reuse of ETH on the consensus layer. Users that stake ETH natively or with a liquid staking token (LST) can opt-in to EigenLayer smart contracts to restake their ETH or LST and extend cryptoeconomic security to additional applications on the network to earn additional rewards.