SEO WordPress Plugin by Mervin Praison is a Powerfull Plugin which has many SEO Features. Google Authorship and Google Analytics Integration.
Stallion WordPress SEO Plugin enhances WordPress SEO plugins like Yoast SEO and All In One SEO that damage a sites SEO by using noindex or nofollow.
The WordPress SEO Comments Plugin turns comments into search engine optimized portals to your blog, new Google SEO entry points into WordPress sites.
Control how WordPress widgets are shown, works with the WPML language plugin, bbPress/BuddyPress and as part of a Silo SEO links structure.
Version: 1.0 SEOS WordPress plugin. Simply amazing and easy to use.