We are planning to release next update for the ViewerX along side with the VNC Manager v3.1 release.
This version is going to include UltraVNC DSM plug-in support.
At this point it seems the ViewerX covers almost all features from different distributions. There is one feature we would like to implement is support for the RealVNC Ent.Ed. authentication. But for now this feature is put on hold due to unwilingnes of the RealVNC management to license this technology to us.Should you guys have any feature requests or suggestions we would be glad to hear them!