Taxonomy Defaults allows you to assign default terms from any vocabulary to any node-type. The default terms will be pre-selected on the /node/add form, but can be edited.
If a vocabulary is marked as "Hidden" for a particular content type, then that vocabulary will not be shown on the /node/add form and the default terms will be assigned automatically and cannot be edited.
Invitations are important to create network effects and exponential growth of a community of interest. This module provides an Invite a friend feature to allow your users to send and track invitations to join your site.