Michael

In this plugin you can set an individual title and description for each page and post and they will placed in the header of the page.
Additionally the uft-8 charset is set.

mst_meta

Plugin, which sets meta-title and meta-description like you give it for post or page.

Stephan Spencer

Title tags are arguably the most important of the on-page factors for search engine optimization (“SEO”). It blows my mind how post titles are also used as title tags by WordPress, considering that post titles should be catchy, pithy, and short-and-sweet; whereas title tags should incorporate synonyms and alternate phrases to capture additional search visibility.
Now, thankfully, there is a solution, allowing you to decouple post titles from title tags. Introducing… the SEO Title Tag 3.0 WordPress plugin. With version 3.4.1 we have added the ability to mass edit meta descriptions and slugs on top of the original title tag editor!
SEO Title Tag makes it dead-easy to optimize the title tags, meta descriptions, and slugs across your WordPress-powered blog or website. Not just your posts, not just your home page, but any and every title tag, meta description, or slug on your site! If this plugin, along with a little keyword research and copywriting of optimized titles, doesn’t make a significant impact on your search traffic, you’re doing something wrong!
SEO Title Tag is authored by SEO specialist Stephan Spencer. Version 2.0 was a collaborative effort – Stephan did the concept development and Oliver Kastler, Mike Harding and Elton Fry did all the heavy lifting. Andrew Shell took over development responsibilities from versions 2.1-2.3.3. For our latest, and most exciting launch, we have recruited the help of Zapbuild. SEO Title Tag 3.0 is completely free and has been released as “open source” under the GPL license. So enjoy!
Features include:
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Allows you to override a page, post, category, tag, or url’s title tag, meta description, and slug with your own custom entry.
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Mass editing of title tags, meta descriptions, and slugs for all posts, static pages, category pages, tag pages, tag conjunction pages, archive by month pages, – indeed, any URL – all in one go.
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Define a custom title tag and meta description for your home page (or, more accurately, your Posts page, if you have chosen a static Front Page set under Options -> Reading), through the Settings -> SEO Title Tag page in the WordPress admin.
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Define the title tag and meta description of 404 error pages, also through Settings -> SEO Title Tag.
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The ability to upload titles, meta descriptions, and slugs directly through a CSV file, making mass editing even easier!
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Title tags of category pages can optionally be set to the category description. If you use a Meta Tag plugin like Add Meta Tags, then you should not use this feature and instead let the Meta Tag plugin use the category description for the meta description on category pages.
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If you choose to keep the blog name in your title tags (not recommended!), the order of the blog name and the title are automatically reversed, giving more keyword prominence to the title instead of the blog name. Note there is also an option to replace your blog name with a shorter blog nickname.
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And best of all, the plugin is FREE!
Suitably convinced? Then Download the plugin !
<h3>To-do</h3>
<ul>
<li>Add some more text to the titles of tag pages globally. They are using the same divider as used for posts, and really there should be an option to add something like “Tag | Posts Related to Tag | Blog Name”</li>
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<h3>Feedback?</h3>
Got a bug to report? Or an enhancement to recommend? Or perhaps even some code to submit for inclusion in the next release? Great! Share your feedback with the author, Stephan Spencer, either below or on his blog at this post (http://scienceofseo.com/seo-title-tag-plugin/).

SEO Title Tag

Search engine optimize your blog's title tags. Mass edit the title tags of posts, pages, category pages, tag pages - indeed, any URL!

mst_meta vs SEO Title Tag