Jitsi is stateofthe art video conferencing software that you can selfhost or simply use at meet.jit.si. Jitsi is powered by a set of open source projects, API's and Mobile SDKs, and an extensive community of open source and commercial developers.
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Learn more at https://jitsi.org
Try it now at https://meet.jit.si
See the code at https://github.com/jitsi