Google Voice is a VoIP/SIP program that can be used to make free or very cheap phone calls to many countries around the world. If you’re located in the United States, then your calls to the USA or Canada will be completely free. Not only that, but the program comes with a rich feature-set that includes voicemail, conference calls and video conferencing, SMS to email, a voice transcription service and a full featured contact list that lets you manage all your contacts’ details.
Continent Telecom Ltd offers local phone numbers (DID) in 90 countries of the world.
Call forwarding to your mobile or landline phone. Forwarding to SIP and Skype is free. Fax forwarding to your e-mail.