Skype Competitor Viber Hits 175 Million Users, Up From 140 Million+ In December | TechCrunch

Another telephone substitute!

http://techcrunch.com/2013/02/26/skype-competitor-viber-hits-175-million-users-up-from-140-million-in-december/

Sketches from scratches:  http://Woohs.blogspot.com