MultiVNC is a cross-platform Multicast-enabled VNC viewer based on LibVNCClient. The desktop client runs on Unix, Mac OS X and Windows. There also is an Android client.
1.8.12 (last stable version on Google Play) imports and exports XML, master switched to a Room backend but stil uses XML. master needs 98e2360f4dcf7607d1a8cdc7c057bd2655faf824 to import on Android 11.