+<li> Filesystem development and testing.
+<li> Bridge between proprietary disk storage/hypervisors, and
+the free world.
+</ul>
+
+<h2>Get it</h2>
+
+<ul>
+<li> nbdkit ≥ 1.8.1 now available in all major Linux distros.
+<li> FreeBSD, OpenBSD, Haiku also supported as a server <small>(but
+those don't have kernel loop clients)</small>.
+<li> nbd client ≥ 3.18 and kernel ≥ 4.18 recommended.