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.
SLT is an Etherum (ERC20) based token with a goal to create fully transparent decentralized cryptocurrency exchange platform which is focused on the needs of its users. Platform will focus on revolutionizing transactions speed and achieving instantaneous execution with successful use of maximum what blockchain technology can provide INSTEAD of centralized processing. As an extra feature this exchange will have its own prepaid card from which every member can cash out their profits.