Consume Postgres LISTEN/NOTIFY messages in your JVM applications using RxJava, and the standard Postgres JDBC driver.

Your App -> Postgres NOTIFY -> NATS

Real-time WebSocket server with ActionCable protocol for Mothership

PubSub library using Postgres Listen-Notify

Tag-based cache invalidation through the database you already have — @stalefree/core (framework-agnostic, Postgres LISTEN/NOTIFY bus, no Redis) + @nest-native/cache (NestJS adapter)

Postgres-as-queue workflow engine

A PostgreSQL-native distributed job scheduler and processing engine supporting exactly-once execution, delayed jobs, retries, dead-letter queues, LISTEN/NOTIFY-based worker coordination, and horizontal scaling.

Async job processing engine in Rust — Axum, sqlx, Tokio, Postgres LISTEN/NOTIFY, concurrency-capped workers.

Implementation of postgres listen/notify mechanism in Go

Socket.IO pub/sub over PostgreSQL LISTEN/NOTIFY for fan-out across multiple Python workers.

A proof-of-concept for inter-application communication using the database as the message broker—no RabbitMQ, Kafka, or HTTP between services. Applications exchange events via a shared PostgreSQL table and PostgreSQL LISTEN/NOTIFY for push-based delivery.

PostgreSQL 18-first realtime chat with FastAPI, WebSockets/SSE, React web client, and PG-native observability.

🔗 Streamline WebSocket connections with OrbitCast, an ActionCable server for Mothership that efficiently handles multiple clients using Unix sockets.