The Google+ Hangouts allow:
Chat face to face wherever you are
Catch up talking to your family, colleagues or customers from your computer, phone or tablet.
Organize virtual meetings
Organize meetings with up to ten people and use powerful tools like screen sharing and Google Docs to increase the productivity of your team.
Issue your conversation to the world
Have a conversation you’d like to share with the world? When you start a hangout, check “Enable Live Hangouts” publicly broadcast your hangout to live from your Google+ profile, your YouTube channel and your website. During the broadcast, you can see how many viewers are watching it live. When you finish your issue, it will raise the public record your YouTube channel and your original post Google+ to be easy to share and discuss the issue once they have finished.
Skype is a program that allows video calls and video calls to PCs, landlines or cell phones. Can be exploited both to take your home office and for small, medium and large companies to save money and improve productivity.