Voip Efonica Business VoIP :

Efonica Offers free member-to-member calling as an exciting complement to a full range of enhanced paid products, services and features. Calls can also be placed to non-members (regular landline and mobile phones) at significant cost savings. 
Efonica is designed to work with or without PCs, and on wireless, broadband, and even dial-up Internet connections. 

Buy Efonica and enjoy service quality ,the ease of use, its wide coverage and low cost; it really worth trying.

Source : http://www.onecard.net/customer/products.html?categoryId=3&localMerchantId=115326&siteLanguage=en