You don't have to download and install anything. Just go to Dialpad. No, but some are, so why should you pay if the quality is not that much better. Telephony TrulyGlobal FREE - The basic TrulyGlobal Internet Phone service is free. BuddyPhone FREE - Good audio quality.
Phone calls over the Internet at no additional charges.
Really Easy Voice NOT FREE - Very easy. FREE - Must be integrated with ICQ . Used to send a telephone voice message to ICQ contacts. Net2Phone NOT FREE - To call any telephone in the world. Charge per minute.