Wouldn't say that I have many favs now - Cartesi is the one I follow. Wide opportunities - Smart Contracts Taken to the Next Level. Build smart contracts with mainstream software stacks. Take a productive leap from Solidity to the vast universe of software components supported by Linux. Enable million-fold computational scalability, data availability of large files and low transaction costs. All while preserving the strong security guarantees of Ethereum. From games where players conceal their data to Enterprise applications that run on sensitive data, preserve privacy on your DApps. Google them, cause there are many know-hows