I think this is the best video calling software for groups also.
#freevideocalling, #skypevideocalling, #video calling for free

Is Skype free to use?
You can use Skype on a computer, mobile phone or tablet*. If you are both using Skype, the call is completely free. Users only need to pay when using premium features like voice mail, SMS texts or making calls to a landline, cell or outside of Skype. *Wi-Fi connection or mobile data plan required.

Skype is software that enables the world's conversations. Millions of individuals and businesses use Skype to make free video and voice one-to-one and group calls, send instant messages and share files with other people on Skype. You can use Skype on whatever works best for you – on your mobile, computer or tablet.

Is Skype video or audio?
Skype is a fantastic (and free) way to audio or video chat from computer to computer. Now is a great time to learn how both audio and video chatting work on Skype so you can keep in touch with friends and family, no matter where in the world they happen to be.