User content submission: Allow users to submit to any area of your site. Optionally enable validation so staff must approve the content before it goes live.

Public awards: Give public awards to your choice of “best content”

Per-usergroup privileges: Give special members access to extra features, like file storage

Recommend: Visitors can recommend your website or a page to other visitors. Control who can specify their own custom message and those who must use the default (spam prevention).

Members can report content to you for review via "Report This" links (which creates a Support Ticket with a copy of the content at the time of reporting). You can also turn validation off for content to hide it after a certain number of reports.