How to make international telephone calls to India using voip service, is there any provider for free service?

Hello katybug,
Thanks for your reply. But using Skype we need to pay money for landline calls. I am looking for phone-to-phone free calling service using VoIP. Is Ipvani is ok for this. If go with Vonage monthly charges are there. Please let me know on this, Once again thanks for your resply

-Sachin.