Is there (Ideally) a native application to handle either of these protocols for using remote systems? Native is preferred with RDP being preferable to VNC.
I did find NXVNCViewer, but I'm finding it doesn't work with my setup (Cube running Openstep 4.2). I've seen references to an Openstep VNC Viewer that is supposed to work better, but no working links from which to download it.
Maybe this is what you're looking for? ftp://ftp.netinch.com/pub/openstep/mach/sourcelibrary/frameworks/VNCViewer/