Skype is a free communication application that works with desktop systems as well as mobile operating systems. You can make video or audio calls, send text messages, share emoticons, documents, images, multimedia content and much more. It’s a secure platform that protects your information and content from unauthorized users. While it’s a free tool, you need to purchase credits if you want to make calls outside of this software. It’s a resource-efficient tool that doesn’t negatively affect your system’s performance. It helps you keep your contacts in one place and stay in touch with your social circle.