Nimbuzz Messenger is an application that helps you communicate with all of your phone and social network contacts.
You can also create groups of contacts and chat rooms to stay organized.
One of the most striking features of Nimbuzz Messenger is that if you are not connected to the Internet, alternatives to receive and save messages. In other words, your phone will not have messages until you get a connection and read it yourself.
Just like Viber or Skype, Nimbuzz Messenger lets you make phone calls, as long as you pay a small fee. In any case, the fees are quite cheap.
Nimbuzz Messenger is a good alternative for a similar communication application which you can find in Google Play or App Store.