SEO WordPress Plugin by Mervin Praison is a Powerfull Plugin which has many SEO Features. Google Authorship and Google Analytics Integration.
SEO Tag Cloud Widget displays the tag cloud in a SEO-friendly way, using a search engine optimized html markup.
Canonical SEO Content syndication plugin adds rel=canonical tag for content syndication. The meta box is added at edit post section.
Drive targeted search visitors to your website by focusing on the most promising organic keywords in your existing traffic.
Displays a table listing of all Categories registered on your website. Shortcode.
Create and maintain a complete, customized, and up-to-date events page on your WordPress website in minutes.
Displays a clear warning when search engines are being blocked and sends regular email reminders to the site admin.
Helps generating the main SEO components Keywords, 160 char description and tags.
Nofollow Tags For Movies Sites adds the nofollow tag to all of your outgoing links to video hosting websites. Perfect if you're running a movies
The SEO plugin by Websites by Mark is an on-page technical SEO tool inspired by IBP and SEO Profiler.