A quick video on how to install Viber on your Mac. The Viber app allows you to make free SMS and phone calls from your Mac.
You download Viber for the Mac under the download section of my site from here.
The advantages of Viber over Whatsapp is that the phone calls to other Viber users are free. However Whatsapp messaging and location features are pretty cool. Anyway everyone should at least check this out because you can make calls from your laptop which I think is pretty cool.