Socket.io

npm install socket.io

http://socket.io/#how-to-use

https://github.com/LearnBoost/socket.io

https://github.com/learnboost/socket.io/wiki

Документация/Статьи

http://habrahabr.ru/sandbox/51453/

http://socket.io/#how-to-use

https://github.com/learnboost/socket.io/wiki

http://stackoverflow.com/questions/17209717/how-to-integrate-nodejs-socket-io-and-php

https://sohabr.ru/post/218463/

http://stepansuvorov.com/blog/2012/04/node-js-%D0%B2%D0%BC%D0%B5%D1%81%D1%82%D0%B5-c-%D0%BC%D0%BE%D0%B4%D1%83%D0%BB%D0%B5%D0%BC-socket-io/

http://www.itlessons.info/nodejs/simple-chat-with-nodejs-and-socket-io/

http://dizballanze.com/Node.js/ispolzuem-sessiiu-express-v-socketio/

http://hashcode.ru/questions/tagged/socket.io/

http://kuroikaze85.wordpress.com/2010/06/15/socket-io-node-js-game-making/

http://frontender.info/building-multiplayer-games-with-node-js-and-socket-io/

http://habrahabr.ru/search/?q=%5Bsocket.io%5D&target_type=posts (*)