Calleveryone.com
Calleveryone.com is a VoIP service that can be used to make low-cost and free international calls from your computer or from your landline phone (in this case you need to buy an adapter). Calls among registered users of calleveryone.com are completely free. A basic calling plan costs $7/month + $.039 per call. Key features include voicemail and conference calls . SMS text messaging is not available. Registration is mandatory.