What are some alternatives?
Cage - A simple way for designers and teams to share, manage and approve their creative work.
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
BobRTC - BobRTC is a VOIP platform dedicated to thwarting telephone fraud, illegal robocallers and scams.
VideoMeeting - VideoMeeting is a free and open source video conference solution built to have video calls and chats using your web browser. It is deployed on top of hubl.in.
Slack - A messaging app for teams who see through the Earth!
Online Video Call - Make free video calls to anyone without registration.