Skype
Skype is a software application for calling, messaging and sharing with others- wherever people are. Millions of people download and use Skype every day for video calling, IM, mobile chat and calls which are free services. Using its paid services, user can call to mobiles and landlines worldwide at low rates, send text messages, and group video calls with up to 10 people. Skype is now part of Microsoft. Features are
  • Calling: Make free Skype to Skype calls or call mobiles and landlines home and abroad at low rates. In calling service we found Skype to Skype calls, call to mobiles and landlines, group calls, Skype number, Forward calls, caller ID, Skype to go(Call international numbers from any phone at Skype’s low rates)
  • Video: Seeing is believing. Catch up face to face or get a whole group together on a video call. The services are one to one video calls and group video calls.
  • Messaging: Instant messaging, voice messaging and sending texts are in messaging.
  • Sharing: The service includes sending files, screen sharing, group screen sharing, and send contacts.
  • Other features are
    Skype to facebook -Instant message, video call with Facebook friends and check out your news feed directly from Skype.
    Skype WiFi - Get online at over a million public hotspots worldwide.
    Skype Manager - One tool to create accounts, allocate credit and assign features.
    Skype Connect - Make Skype calls through your existing SIP-enabled PBX.
    Skype for Outlook.com - Enjoy the magic of video calls with your Messenger and Skype friends
 

 

  Viber
It is application that allows to users send free text messages, photo messages, video messages and share locations with other users. Users can also make free HD-quality calls to other Viber users on iPhone®, Android™, Windows Phone, Blackberry®, Windows®, Mac, Symbian, Nokia S40 and Bada devices over 3G/4G or WiFi connections.
 

 

  Whatsapp
It is messenger that works in cross-platform mobile messaging app for iPhone, BlackBerry, Android, Windows Phone and Nokia. User can send text, video, images and audio.
 

 

  Windows Live Messenger
It is a deprecated instant messaging client developed by Microsoft. This messenger is now discontinued from March 15, 2013. The features were
  • Album viewer
  • Appear offline to individuals or categories
  • Social networks integration
  • Offline messaging
  • Games and applications
  • Messenger Companion