Skype lets you make free voice calls between users of the program and paid discussions with holders of fixed or mobile phones using VoIP (Voice over IP), but at a much lower price than in the case of traditional telephony.
In addition, Skype offers features direct exchange of text information using manually typed messages, file transfer and video conferencing. To telephone the someone who uses Skype, just find this person on your contact list and click on the big green button.
With Skype, you can call your friends who do not yet have a computer. This is called SkypeOut, and allows you to call any phone number worldwide at very favorable prices.
Skype 7.18.342 for Mac Details:
Manufacturer: Skype Ltd.
License: Freeware (free)
System: Mac OS X
Size: 41.5 MB