Kakarot is a zkEVM written in Cairo. It aims to allow users to leverage the scaling benefits of validity rollups while maintaining compatibility with the Ethereum ecosystem. Therefore, Kakarot can be used to run Ethereum smart contracts on Starknet.
Octo is a social gaming platform that enables users to monetize their time spent playing video games on the Solana blockchain. It is also a core service provider for NFT collections and brands, developing games that are integrated into the app and branded.