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.

unimakura

This plugin uses Slug or PostID for PostName. It is done automatically.
<h3>Arbitrary section</h3>
If you would like to post from other application for example “windows live writer”, you must use to WordPress 3.3 or higher. If you want to use PostId forcibly, please enter “postid” to slug.

Slug or PostID

This plugin uses Slug or PostID for PostName. It is done automatically.

Custom Author URL vs Slug or PostID