All in One SEO Pack      <-download

Out-of-the-box SEO for your WordPress blog.

Version 1.6.10.2

By Michael Torbert

Google XML Sitemaps    <-download

This plugin will generate a special XML sitemap which will help search engines like Google, Yahoo, Bing and Ask.com to better index your blog.

Version 3.2.2

By Arne Brachhold