Skype is the world's #1 VoIP calling service and is so ubiquitous nowadays that many people take it for granted. However, it has revolutionized the way we connect to each other. While email democratized the way we contact someone in other parts of the world, Skype reached even further. It merged the networking power of the web, based on Voice Over Internet Protocol, and the Sci-Fi fantasy of video calls. It is pretty incredible that just 15 years ago people spent fortunes on international voice calls.
With Skype, you get voice chats, video calls, and instant messaging. Beyond that, you can conduct conference calls with up to nine people, not including you, thanks to Skype's technology of multiple caller hosting and grouping. The catch is you have seven days only to test the group calls for free. You will be asked to pay for this feature after that.
There's more to Skype as you can send video messages and instant messages to your friends and receive video messages even while you're offline. The screen sharing function lets you see your contact's desktop — great for troubleshooting your grandma’s malfunctioning computer — which is alone a compelling enough reason to install Skype.