Conversations and it's forks are all very good clients, and their voice/video chat works perfectly once the XMPP server configures the turn server. Gajim got a

Conversations and it's forks are all very good clients, and their voice/video chat works perfectly once the XMPP server configures the turn server. Gajim got a lot better recently. I even managed to get Pidgin to a decent, albeit not perfect level.