jonbullock

Applies the following simple search engine optimisations to your blog:
<ul>
<li>Shows “Site Title” in page title always no matter what content your viewing</li>
<li>Shows any content descriptor (page/post title etc.) first in page title</li>
<li>Uses post excerpt as value of “description” meta tag</li>
<li>Uses post tags as value of “keywords” meta tag</li>
<li>Uses tag name as value of “keywords” meta tag when viewing posts for a tag</li>
<li>Uses category name as value of “keywords” meta tag when viewing posts for a category</li>
<li>Uses date as value of “keywords” meta tag when viewing posts for a date</li>
</ul>
That’s it really, pretty simple stuff.

Basic-SEO

Applies basic search engine optimisations to your WordPress powered site.

jonkemp

Removes unwanted tags from your WordPress header.
The function wp_head; found in the header.php template file adds unnecessary tags to your WordPress template. These tags are the RSD, or Really Simple Discovery, link, the Windows Live Writer Link and the WordPress version number. This plugin will stop all 3 tags from being automatically added to your WordPress header.

WordPress Head Cleaner

Removes unwanted tags from your WordPress header.

Basic-SEO vs WordPress Head Cleaner