Roles:
Each website will have built in roles to identify your visitors, registered users, site administrators, and much more. Roles that are assigned to users can limit or enhance the viewable content or interaction with others on your site. 
Bulk Email:
Send email from your site to registered users. This feature will also allow you to filter email to specific groups of users defined by their role.
Announcements:
Keep your visitors informed with fresh timely announcements that can be set to remove themselves from view with an expiration date.
Calendar:
Keep you visitors informed with visual representation of your upcoming events. Users can click on a calendar day to see the events scheduled.
Document Organizer:
Upload documents for your visitors to download at their convenience.
Feedback:
Allow your visitors to respond to your questions and have it sent to your inbox without posting your email address on your site.
NewsFeed:
Import RSS newsfeeds to keep your visitors informed with news from around the world, or from subjects ranging from Industry news to Sports news.
Survey Tool:
Create simple surveys for your visitors to vote on.