WhatsApp Messenger

WhatsApp lets you chat for free with anyone else who owns the app and offers a few extra useful features to make text messaging more fun.

How it works

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.

WhatsApp Messenger (iPhone|Android) lets you chat for free with anyone else who owns the app and offers a few extra useful features to make text messaging more fun. With this chat app installed on your smartphone, you'll save a little money on text charges through your carrier and across platforms. The only catch is that you'll have to persuade your most frequent texting buddies to download the app, too, but once they see WhatsApp's advantages, they'll probably give it a try
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Like iMessage for iOS, WhatsApp Messenger shows your chats in little text bubbles, gives you a time stamp for messages, notifies you when a text has been viewed by your recipient, and lets you include photos, audio notes, and videos within your conversations. But with WhatsApp Messenger you can also change your background and send your GPS location to an interactive map. You can use premade away notes such as "I'm busy" or "Available" or even "My battery is about to die," and you can block specific contacts from within the app. You also can easily send a friend's contact information to another user without leaving the app.

Minimum requirements:

• Android OS 2.1 or above
• Unlimited internet data plan recommended
• Tablet devices are not supported

 Developer: WhatsApp 

 Download Here