Alex King

Crowd Favorite

Delink Comment Author gives you the ability to remove the link a commenter left as their URL without removing the entire comment.
<h3>Usage</h3>
Click on the link in your comment e-mail notification or in the comment list to remove the commentors link from their comment.
<h3>Known Issues</h3>
Adding the link to the comment list requires jQuery, which is included in WordPress 2.2 and later.

Delink Comment Author

Delink Comment Author gives you the ability to remove the link a commenter left as their URL without removing the entire comment.

Brandon Allen

This plugin allows full control of your user permalinks, allowing you to change both the author base (the ‘/author/’ portion of the author URLs), and the author slug (defaults to the username of the author). You can set the author base globally, or you can set it to be user-specific based on a user’s role. You now have the power to craft the perfect URL structure for you Author pages.
WordPress default structure http://example.com/author/username/.
Edit Author Slug allows for http://example.com/ninja/master-ninja/.
Using a role-based author base would allow for http://example.com/ida/master-splinter/ (for an Administrator Role), or http://example.com/koga/leonardo/ (for a Subscriber Role).
Development of this plugin takes place on <a href="https://github.com/thebrandonallen/edit-author-slug/" title="Edit Author Slug on Github" rel="nofollow ugc">GitHub</a>. Pull requests are always welcome!
Translations should be submitted to <a href="https://translate.wordpress.org/projects/wp-plugins/edit-author-slug" rel="nofollow ugc">Translate WordPress</a>.

Edit Author Slug

Allows an admin (or capable user) to edit the author slug of a user, and change the author base.

Delink Comment Author vs Edit Author Slug