Hyperledger Cacti is a modular, plugg‑in framework that enables secure, atomic transactions across heterogeneous blockchain and distributed‑ledger networks without requiring a single settlement chain. It provides a suite of protocols, SDKs and relay/node‑server components—merged from the former Cactus and Weaver projects—to let enterprises and developers interconnect platforms such as Hyperledger Fabric, Besu, Corda, etc., while preserving each network’s autonomy, privacy and governance. The project targets blockchain architects, DLT‑based application builders, and organizations that need cross‑chain asset transfer and data sharing.