Jared Harbour

Ever want to change the url used to display your posts? This plugin 
allows a blog administrator to change a users url slug from their edit profile page.
The plugin allows for the creation of new author slugs, but also saves old slugs a user has used in the past.

Plugin Name:       Modify Author URL

Allows administrators to modify a users author url from their profile page.

Residence mixte

Useful in french, with this plugin simple quotes (apostrophes) will be changed to dashes (-) to keep slugs readable and SEO friendly.
Before :
<ul>
<li>“L’équipe” > lequipe</li>
<li>“L’histoire de France” > lhistoire-de-france</li>
<li>“Suzy’s Place” > suzys-place</li>
</ul>
With this plugin :
<ul>
<li>“L’équipe” > l-equipe</li>
<li>“L’histoire de France” > l-histoire-de-france</li>
<li>“Suzy’s Place” > suzy-s-place</li>
</ul>

French Slugs

Changes simple quotes (apostrophes) to dashes (-) to keep slugs readable and SEO friendly, mostly in French.

Plugin Name: Modify Author URL vs French Slugs