https://github.com/mitchellh/vagrant/wiki/Available-Vagrant-Plugins

https://github.com/fgrehm/vagrant-cachier


https://github.com/chef/vagrant-omnibus
vagrant plugin install vagrant-omnibus

  if Vagrant.has_plugin?("vagrant-omnibus")
    config.omnibus.chef_version = 'latest'
  end


https://github.com/berkshelf/vagrant-berkshelf
vagrant plugin install vagrant-berkshelf

  config.berkshelf.enabled = true