marble
Functional reactive Node.js framework for building server-side apps
..., database access, etc. Using its monadic nature we can map I/O operations over effects and flat them to bring in other sequences of operations. RxJS is used as a hammer for expressing asynchronous flow with monadic manner. Marble.js doesn't operate only over basic HTTP protocol but can be used also for general MDA (Message-Driven Architecture) solutions, including WebSocket, microservices or CQRS, where the multi-event nature fits best.