Basically I’m looking for any calling card that I can use to make some quick calls if I need to reach my other co-workers who have cells (e.g: we are in Florida, need to call his New York cell phone). Any suggestions or guidelines?
Comfi INC
It’s an online prepaid phone card so you can sign up within minutes and make your calls right after. They got a couple of local access numbers in Boston, rates for calling Florida is charge at 2.5 cents per minute. No other fees whatsoever.


CallCentric is a VoIP service that also provides Calling Card gateway access to their network. So, you have the choice of how you make your calls: ie. Calling Card gateways, PC based Softphone, or VoIP adapter.
ring plus works like a calling card, but gives you free long distance and international calls, you just have to listen to ads, instead of the phone ringing