Never used it, but this looks interesting, it is GPL for the source code. http://bigbluebutton.org/open-source-license-2/
There is also Jitsi with LGPL, https://jitsi.org/
Never used it, but this looks interesting, it is GPL for the source code. http://bigbluebutton.org/open-source-license-2/
There is also Jitsi with LGPL, https://jitsi.org/