Netcode for GameObjects is a high-level netcode SDK that provides networking capabilities to GameObject/MonoBehaviour workflows within Unity and sits on top of underlying transport layer.
The StreamJsonRpc library offers JSON-RPC 2.0 over any .NET Stream, WebSocket, or Pipe. With bonus support for request cancellation, client proxy generation, and more.
Easy to use high performance Network library for Unity 3d
Efficient reliable UDP unicast, UDP multicast, and IPC message transport - .NET port of Aeron
Lightweight message bus interface for .NET (pub/sub and request-response) with transport plugins for popular message brokers.