you should try to search on yourself first on goggle then ask here! http://www.wolf-howl.com/seo/seo-plugins-for-wordpress/
Check this website http://www.wordpressbundles.com/, it has all seo plugin already installed, easy setup.
I have written an article about SEO plugin for WordPress before. Probably, it is time that I update some information on that. But nonetheless, those that I have mentioned are still pretty helpful.