Featured Comments allows site admins to select certain comments as 'featured' using AJAX links derived from the Nodequeue module. Comments can then be given weights in the admin interface.
Do you want to allow anonymous users to comment, but also want to ensure that the email addresses they enter are THEIRS? Not So Fast creates a new column in the comment approval queue labeled "Email is verified?". When anonymous users post comments, an email is sent to the address they specify. The email contains a link which, when clicked, will register their address as being verified. Site administrators can then determine whether to approve or delete comments based on this new criterion.
Not So Fast works as an excellent spam deterrent, but also permits site administrators to keep in touch with (and keep records of) the anonymous users who post on their sites.
I am open to suggestions about future directions for this module.
Semantic Similarity automatically computes semantic similarity scores between each node, which helps to detect duplicate (high scores) or complementary (medium scores) content.
Features
computes scores at cron time
provides blocks [1] on node page to display a node's most/least semantically similar nodes
provides a page [2] that list most/least semantically similar nodes
Provides a visual testing page for Drupal themes. Quickly compare the display of common elements across your themes, and verify that your new theme addresses all common style elements.
The Style Guide module creates a preview page for displaying common theme elements in all active themes for your Drupal site. The module comes with previews for common HTML elements, such as tables, forms, links and lists.
Demo site
You can see the module in action at the demo site built by davidneedham. It shows how Style Guide displays several common themes.