SockJS is described as 'Browser JavaScript library that provides a WebSocket-like object. SockJS gives you a coherent, cross-browser, Js API which creates a low latency, full duplex, cross-domain communication channel between the browser and the web server' and is an app in the development category. There are seven alternatives to SockJS for a variety of platforms, including Windows, Linux, JavaScript, Mac and Node.JS apps. The best SockJS alternative is Socket.io, which is both free and Open Source. Other great apps like SockJS are Primus, SignalR, Faye and UbSub.