From United Online | NetZero Internet:
NetZero VOIP allows users to make unlimited Computer-to-Computer calls to anyone, anytime, anywhere. NetZero VOIP is a smart way to save money on long distance bills and stay in touch with your friends all over the world for FREE. There is no cost and no credit card required to join the NetZero VOIP service. NetZero VOIP works over any type of Internet connection, including dial-up, and offers voicemail, call waiting, caller id, call blocking, an online message center, and instant messaging - all for FREE. If you want to call landlines and mobile phones, you can easily upgrade to one of our low-cost calling plans for as little as $3.95 per month and enjoy conference calling, call forwarding, and a personal telephone number with the area code of your choice. The software version currently offered is a Beta version of NetZero VOIP and is provided through download.com to offer consumers a chance to preview the product.