There's also Solaris Containers, which leverages ZFS snapshots, etc.: http://en.wikipedia.org/wiki/Solaris_Containers http://en.wikipedia.org/wiki/Solaris_Cont

There's also Solaris Containers, which leverages ZFS snapshots, etc.: http://en.wikipedia.org/wiki/Solaris_Containers http://en.wikipedia.org/wiki/Solaris_Containers Of course, Solaris is even more despised by some people since they changed hands. I think Docker appeals more to people, because: - It's on Linux, which is more popular than FreeBSD or Solaris. - It's very easy to set up and configure. - Integration with Puppet et al. - The have great marketing :).