Does any one know a real open source alternative to Viber and Skype offers at least:
- Chat
- Group chat
- PC to PC calls
- PC to PC group calls
- Video chat
- Desktop sharing
Currently Pidgin support most of the above options (through XMPP) but it's not stable at all and just works under Linux. I'm looking for a solid as rock solution (personally I found Skype is the one but it's proprietary application)
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