Skype is a simple video chat application that allows you to call your friends through the Internet for free. Each user you call should have a Skype or Outlook account. Skype also allows calling to mobile phones or landline numbers to various countries by paying per-minute call charges. Skype provides a simple interface where you can search for people with their name, number, etc. After connecting, you can send messages, photos, video clips, emoticons, location, contacts, and other files by simply dragging and dropping them onto its interface.