Flaphone™ – Free Calls, Chat, Messaging Web-Based SoftPhone
http://www.flaphone.com/

Flaphone™ is a free web-based softphone which allows you to make calls from the Internet page. You don’t need to download, install or configure anything. Flaphone™ users can call each other, to SIP phones and to any phone numbers, using SIP providers. Flash Player Version 9.0+ is required. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog. This has been aded to World Wide Web Reference Subject Tracer™ Information Blog.