New York Transit Wireless has a free, open wifi that is open in many stations, which I use frequently. It is a little bit of a throwback using it on the subway

New York Transit Wireless has a free, open wifi that is open in many stations, which I use frequently. It is a little bit of a throwback using it on the subway though, as it does not work in the tunnel, so you have to wait to stop at a station, get the wifi signal back, send out your web page request and receive it, then the train goes into the tunnel again and your connection goes dead again. It is better than nothing though.