Communication Apps for Smartphones

Viber

Viber automatically detects which of your contacts already have Viber, so all you need to do is select a name and start a conversation. No invites. No hassle. With Viber's user-friendly interface, you can easily send messages and make calls. You can also change your profile picture, identify which of your contacts already have Viber, and see who else has recently joined.

 Best-quality Video and Audio calls using 3G or WiFi

 Free text, photo and video messages with location-sharing

 Call non-Viber mobile or landline numbers at low rates with Viber Out

 Group messaging with up to 100 friends

 Add friends easily by entering their Viber number or scanning their QR code

WhatsApp Messenger is a cross-platform mobile messaging app which allows you to exchange messages without having to pay for SMS. WhatsApp Messenger is available for iPhone, BlackBerry, Android, Windows Phone and Nokia and yes, those phones can all message each other! Because WhatsApp Messenger uses the same internet data plan that you use for email and web browsing, there is no cost to message and stay in touch with your friends. In addition to basic messaging WhatsApp users can create groups, send each other unlimited images, video and audio media messages.

GroupMe

It's like a private chat room for your small group. Have as many as you want, and it's always free. Now, you can coordinate with coworkers, organize a game night, and keep in touch with family all in the same place. With native apps for iOS, Android, and Windows Phone, you can chat with your friends from your phone on the go, on your computer at the office, and on your tablet from the couch.