Here is a list of available modules:
Bookmarks
The Bookmarks module allows users to bookmark web pages. Since the bookmarks are kept on the web, they can be accessed from any computer on the web. The interface is simple, allowing for a Title, URL, and Description.
Categories
The Categories module allows you to create and manage a list of categories(with unlimited sub-categories). Associate RSS feeds in Seamus, set up Search Directory instances to only display specific content, and allow users to categorize submissions, messages, ect...
Groups
The Groups module allows registered users to create their own groups and invite friends, so you can stay connected. Users can also request membership or leave the group similar to MySpace Groups. Integration with other Vivoware modules allows for great flexibility when configuring your Social Network.
Index Item
Index Item is used for the submission, editing, and display of content. The module is fully templated so the look and feel is totally customizable.
Messaging
Messaging allows users of a site to communicate. When a message is created, any user of the site can be attached as the recipient. Each user will have an inbox/outbox type interface for creating, viewing, and replying to messages. Users also have the option to use Read Receipts.
Messaging Dashboard
The Messaging Dashboard module is a small add on for the Messaging module. It displays the current number of read and unread messages. The displays are also clickable and direct to the user's inbox.
Moderation
The Moderation module allows you or your team to moderate all items indexed by Seamus and content submitted via IndexItem. Moderation provides workflow for managing all items in the index before they appear in search results and/or directories.
Profile Search
The Profile Search module extends the basic “core” DNN user profile. Users can add pictures(within galleries and albums) and friends. Profile pages can also display any groups that the user is a member of. Layouts can be customized via templates.
Seamus
The Seamus module is an aggregation module that will crawl/spider your DotNetNuke portal (Tabs, Modules, Folders, and Files), external websites (including non-DotNetNuke websites), and any RSS feed.
Search
The Search module provides a search form and results, and has the following capabilities:
Search Directory
The Search Directory module provides a categorized directory of items indexed, as well as the addition of new links and sites. Using a template, you can dictate how results are displayed, as well as the detail page.
Stats
The Stats module allows for the display of activity on the site based on statistics. For example, the module can be configured to display a list of the "Most Commented Items", "Most Recent Searches", or "Top 100 Searches" -- just to name a few. Each entry in the list is clickable and will direct the user to the item in question.
Tag Cloud
The TagCloud module generates a list of keywords that are matched to indexed content. You can point the links of each keyword to the Search module, or the Search Directory.
Web Controls
The WebControls module provides controls that we use in most of our modules for bookmarking, commenting, rating, and voting. WebControls will allow you to manage the templates for these controls, as well as manage social bookmarking sites for the social bookmarks control.
Web Services
While Web Services is installed as a module, it's not really a module at all. Once installed, you don't even need to add it to a page. What it does, is it keeps up with all of the karma, rating, ranking, ect... It's also necessary for some of the advanced features that are only included in the Enterprise and Elite editions.