Skype has announced that they are making Group Video calling available to "everyone" (meaning, only Windows desktop, Mac and Xbox One clients) for free. Originally you had to pay $8.99 per month, but not anymore! In addition to group calling, this also enables screen sharing functionality. While it works with up to 10 people it is recommended for 5 or fewer. An alternative is Google Hangouts, which has provided group video calling since nearly the beginning.