* [uWebSockets.js v20.68.0](https://github.com/uNetworking/uWebSockets.js) – High-performance, standards compliant web server for demanding applications.

* [deepstream v10.1.0](https://github.com/deepstreamIO/deepstream.io) – Realtime server enabling high-speed data sync, messaging, and RPCs with authentication and permissions.

* [iodine v0.7.59](https://github.com/boazsegev/iodine) – Fast concurrent Ruby web server with native WebSocket, EventSource, and Pub/Sub support, including C-backed performance optimizations.