* [Centrifugo v6.7.0](https://github.com/centrifugal/centrifugo) – Scalable real-time messaging server supporting multiple transport protocols for building interactive applications.

* [HAVEN v2.8.0](https://github.com/ancsemi/Haven) – Self-hosted private chat server that runs on your machine, offering voice, channels, invite codes, and file sharing.

* [RabbitMQ v4.2.5](https://github.com/rabbitmq/rabbitmq-server) – Feature-rich multi-protocol messaging and streaming broker supporting various protocols.

* [NATS Server v2.12.5](https://github.com/nats-io/nats-server) – High-performance messaging server for cloud-native applications and distributed systems.

* [OpenIM v3.8.3-patch.16](https://github.com/openimsdk/open-im-server) – OpenIM provides a complete set of tools for integrating instant messaging into applications.

* [Sharkord v0.0.15](https://github.com/Sharkord/sharkord) – Lightweight self-hosted real-time communication platform providing voice, video, text, and file sharing with full data control.

* [Harper v5.0.0-beta.1](https://github.com/HarperFast/harper) – Node.js unified in-memory platform combining database, cache, application logic, and messaging for microsecond-level performance.