storeum is a decentralised marketplace that allows anyone to buy and sell products or services for cryptocurrencies on a global scale. The marketplace will support thousands of merchants and millions of listings, with its primary focus on no fees.
ARPA is a Secure Computation Network Compatible With Blockchains They propose a blockchain-based secure computation network of Multi-party Computation (MPC). ARPA cryptographically enables private smart contract, unprecedented data-at-use privacy protection, as well as scalable computational sharding.