Vonage - The Broadband Phone Company : Vonage SoftPhone
Whether you're traveling across the globe or just into the next room, carrying on a conversation doesn't have to mean carrying extra equipment. Vonage lets you travel as light as you like. Download Vonage SoftPhone and you can turn PCs, laptops, or even PDAs into a full function telephone.

Vonage SoftPhone is a screen-based interface that works just like your telephone keypad. You can make a call, receive a call, and pick up your voicemails too. And because it's Vonage, you get the extras that you've come to expect, like Caller ID and Call Forwarding. With Vonage SoftPhone you get most every feature that is available with any other Vonage service. (See 911 Dialing information below.)

Connect to Any Phone Number on Earth for Just $9.99/month

Get a Unique Number Plus 500 Local and Long Distance Minutes

Seems like SoftPhone has a limit of 500 minutes ...call vonage and verfiy this ...1-866-243-4357