This plugin allows you to remove the prefix before the URL to your category page (e.g. example.com/dogs instead of example.com/category/dogs)
Renders social bookmark buttons after the post. Bulgarian social networks are included too. For the full networks list see the plugin details.
Remove ugly characters like %xx from your permalink
Search Permalink redirects search form queries to cruft-free permalink URIs.
Keeps a history of your permalinks no matter what changes you make on your site, and redirects old links to the new ones.
It allows to use undescores '_' in the permalink rather then default hyphen '-'.
By default in WordPress 1.5 and onwards, a post's sanitised name that appears in a permalink structure is checked for duplication and a numeral is app