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I am not exactly looking for Skype alternatives. Looking for video chat solutions in general. Are there any popular video chat solutions based on WebRTC? Have tried Firefox Hello, but it was a barebones solution without features like echo-cancellation etc.

Edited for clarity.

Because of network effects, anything called "A Skype Alternative" is a "Skype Alternative." By which I mean that it's probably no more a an alternative to Skype than Facetime because some people are not on it.

I'm currently trying out Jitsi and XMPP. It seems to work well on new clients, on some older systems there are crashes when they go to sleep, which I couldn't fix yet.

Chrome or Firefox using Google talk or an equivalent web based service works pretty well for me.

Skype alternatives for Linux?