When Jive first developed the SIP and Jingle plugins for Spark with the Media proxy for Openfire, they were well ahead of everyone else. Both plugins have since become outdated and fallen behind with changes to the specs and active development on other implementations like Jitsi
Red5 plugins are no more in active development as WebRTC is the prefered way forward instead of the proprietary Flash player.
Both plugins are crying out for some attention
by anyone who can afford it. The JItsi library (libjitsi) can be used to bring them both up to date. In fact someone has provided everything needed to do this