microkid

This plugin gives you full control over the permalinks for author pages. When using “pretty permalinks”, by default URLs to author pages are structured:
http://www.example.com/author/author-name/
With this plugin you can change the “author” part of these URLs into anything you like, for example:
http://www.example.com/editorial/author-name/ 
http://www.example.com/crew/author-name/ 
http://www.example.com/members/author-name/ 
http://www.example.com/posts-by/author-name/
The plugin will also automatically change links throughout your site that point to author pages. The URLs of author feeds are also changed.
Visit the <a href="http://www.microkid.net/wordpress/author-slug/" title="Wordpress Plugin: Author Slug" rel="nofollow ugc">plugin’s homepage</a> if you have any comments questions.

Custom Author URL

Customize the author slug in the permalink for author pages.

WP Zone

annaqq

Potent Plugins

When this plugin is activated and the title of a post or page is changed, the permalink (slug) of the post or page is automatically updated to reflect the new title. There is an option to disable this functionality on a one-time basis when saving.
If you like this plugin, please consider leaving a comment or review.
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Automatically Update Permalinks

Automatically updates the permalink (slug) of a post or page when its title is changed.

Custom Author URL vs Automatically Update Permalinks