Skype

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Skype is an instant messaging application that’s also excellent for making video and audio calls. Read more about Skype  

Even if Skype is officially considered an instant messaging application, it’s capable of doing a lot more. In fact, its best function has to be the video call, which can support up to 25 people in a single group call. The same can be said about the audio calls.
 
It’s worth noting that all Skype to Skype calls are completely free and don’t incur any kind of costs for the users unless they are using the application with a data plan. As long as the users keep to Wi-Fi or unlimited data plans, there are no costs for the users.
 
Skype can also be charged with credit so that its users can call any landline or mobile network in the world at preferential fees. And, just like with any other instant messaging users can also send multimedia files and have access to a wide range of emoji are both fun and unique to the platform.