auto-discovery of exports?

Windows with the SFU add-on, allowing it to work as an NFS client, manages to scan my network for NFS servers and then show the exported filesystem under each of those servers. How could I implement the same thing in Linux?

I ask because I want to write a program that autoscans my network for certain files (images, music, video) that are readable and displays them in a nice viewer to the user without needing to go searching for them. I want the system to be flexible enough that it can allow machines to be plugged in and out of the network and still detect those shared files when available without any effort by the user.

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