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.
AirSwap is a decentralized token exchange based on the Swap protocol whitepaper. Swap provides a decentralized trading solution based on a peer-to-peer design. The design solves two problems encountered in a peer-to-peer trading environment: counterparty discovery and pricing suggestions.