SearchEkko is a "related posts" widget that uses visitors' search referral terms to find and present your best-matching posts.
If the visitor comes from a known search engine, the widget grabs the used search query and shows internal blog posts that match that query.
HexoSearch button allows visitors to vote for your blog posts to boost their ranking in HexoSearch - the world's first flash-actionscript search engin
Lets you decide which blogroll links have the nofollow attribute. Don't waste link juice!
Add OpenSearch discovery and querying to your WordPress site.
Display to the visitor coming from search engines a message based upon what they're searching for.
Automatic generate standard XML sitemap for wordpress blog and add sitemap into current robots.txt. It's like XML feed.
Removes common words like 'a', 'the', 'in' from post slugs to improve SEO.