Nowclient is a project mainly written in JavaScript, it's free.
Node client for NowJS
Requires websocket-client (npm install websocket-client) and
socket.io-nodeclient (git clone git://github.com/ericz/socket.io-nodeclient.git).
now_barebones.js is a quick example of how to use nowclient.
Usage: node now_barebones.js http://myserver:port/, where
http://myserver:port/ indicates where your Now server is running.