Is there good alternatives to google hangouts ? That preferably works with gmail contacts and/or phone contacts in a native desktop app (i.e. not with an electron style app).
I was interviewed a couple times using http://appear.in. It worked pretty well both times I used it. I didn't have any problems with video or screen sharing.
appear.in is excelent for ad-hoc videocalls (especially with peolpe you don't have in your everyday chat client), but it's not very useful for people you frequently contact, or for quickly upgrading a text-chat into a videocall.
[OpenTokRTC](https://opentokrtc.com/) relies on WebRTC, a vendor-independent HTML5 technology.