Mark Jaquith

Redirect Old Slugs allows you to change your post slugs without breaking your permalinks. People requesting the old link will be redirected to the new link. This all happens automatically.
Note that this functionality was brought into WordPress core for version 2.1, so this plugin is not needed. When you upgrade to WordPress version 2.1 or higher, your old slugs will be kept and will keep on being redirected without the need for this plugin.

Redirect Old Slugs

Allows you to change your post slugs without breaking your permalinks.

vali petcu

Cleans up over 30 problematic characters from your slugs that the original wordpress does not clean:
Characters cleaned: ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 
, ?,
Examples: 
http://www.zoso.ro/%E2%80%9Ctoate-problemele-sunt-rezolvate-am-depa%C8%99it-criza%E2%80%9D/ 
http://www.zoso.ro/toate-problemele-sunt-rezolvate-am-depasit-criza/

Plugin Name: RO Slugs

Cleans up over 30 problematic characters from your slugs that the original wordpress does not clean:

Redirect Old Slugs vs Plugin Name: RO Slugs