
<p>If most of your friends and family are on Facebook already, the stand-alone Facebook Messenger app makes it a breeze to keep in touch. Since you're contacting everyone through their Facebook profile, you don't need to know their phone number. You can also move seamlessly between your computer and smartphone for every chat session.</p><p>WhatsApp MessengeriPhone, Android, Windows Phone, BlackBerry99 for iPhone, free for other platforms</p><p>Advertisement</p><p>The beauty of WhatsApp Messenger is you don't need to know anyone's username to chat - the app goes through your contacts and plucks out anyone who's registered for WhatsApp based on their mobile number. As well as text, photo and audio messages, you can send contacts, locations and video clips.</p><p><a href="http://www.smh.com.au/digital-life/smartphone-apps/top-apps-for-instant-messaging-20130214-2edyq.html">Keep reading...</a></p>