• Secure Invites
    Version: 1.2.4 ·  Requires: 2.7
    Compatible up to: 3.2.1 5 stars4 stars3 stars2 stars1 stars(based on 22 ratings)

    Secure Invites is a Wordpress MU, MultiSite and BuddyPress plugin that allows you to only allow invited people to sign up.