Empower Pro Internet Phone for Mac

From Empower Pro:

Now call friends, family and co-workers direct from your Mac to theirs using the Internet. Just download the Empower Pro Phone and start making calls today.

The Empower Pro Phone enables you to have real-time voice communication so you can talk to friends, family and co-workers over the Internet directly from your Macintosh to their Macintosh. All they need to do is download and run the Empower Pro Phone to receive your call.

Make and receive calls whenever you are on-line. Ideal for people with DSL and Cable Internet connections which are always on. If you have a 56K dial-up connection, your Mac friends can now get through to you while your phone line is connected to the Internet. Amazing quality and clarity over LAN (local area network) and T1/T3 high speed Internet connections.