EventOn RSVP Events Invitees Addon GPL Overview:

With Invitees addon for RSVP, you can invite only the people you want to your rad event!

EventOn RSVP Events Invitees Addon GPL Features:

• Invitation Email
  Auto sends invitation emails to invitees, with a build-in link for them to RSVP to the event.
• Invitee Manager
  Manage who you invite and the status of invited peeps from invitee manager build into event edit page RSVP settings

• Message Wall
  A message between invites guests on a public wall or just private messages.
• Admin Notification
  System inbuilt to send out admin notifications when new guests are invited and when they react to invitations if you have admin notifications enabled of course.