Protocols, networks, and developer tools designed to enable programmable privacy and confidential computation for decentralized applications. Unlike traditional 'Privacy Coins' which focus solely on transactional anonymity, these projects provide the infrastructure for encrypted smart contracts, private state management, and blind computation. They utilize advanced cryptography such as Zero-Knowledge Proofs (ZKPs), Fully Homomorphic Encryption (FHE), and Multi-Party Computation (MPC) to allow developers to build complex applications where data is processed without being publicly revealed.