Zoom - Equip your team with tools designed to collaborate, connect, and engage with teammates and customers, no matter where you’re located, all in one platform.
Messenger Group Video Chats - Makes it simple and seamless to stay connected face-to-face
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
Talkin - Live Twitter townhalls
WebEx - Cisco WebEx Web Conferencing, Online Meetings, Desktop Sharing, Video Conferencing
Confrere - Professional video calling. No downloads. Just a link.