websocat
Command-line client for WebSockets, like netcat (or curl)
.... Directly using unauthenticated SOCKS5 servers for connecting to WebSockets and listening WebSocket connections. Auto-reconnect and connection-reuse modes. Linux, Windows, and Mac support, with pre-built executables. Low-level WebSocket clients and servers with an overridable underlying transport connection, e.g. calling an external program to serve as a transport for websocat (for SSL, proxying, etc.).