visitalk.com provides long distance voice and video calls. Using VOIP, free software and NetMeeting or CU-SeeMe, members receive instant messaging, voicemail, videoconferencing, free PC to Phone calls and other services.
With Skype you can make free calls over the internet to other people on Skype for as long as you like, to wherever you like. It is free to download. You can also call landlines and mobiles at great rates.
Vonage is a leading provider of VoIP internet broadband telephone services. Vonage offers VoIP calling plans to home, residential and business customers who wish to have unlimited long distance with cheap international calling rates.