How to find the free conference call services?

Remember when everything on the Internet was free? When the idea of making money from an online service would cause the inventor of Napster to shudder in disgust? Those days aren’t necessarily over. There are still plenty of free online services out there, especially those powered by VoIP or P2P (peer-to-peer) technology, including free phone calls, free faxes, free conference calls, free phone cards, free lookup services and free webcasting.