Have you wordpress based blog/site? Then here are the best seo wordpress plugins that will help you to make your blog/site more search engine friendly.

1.   All in One SEO Pack
2.   Automatic SEO Links
3.   HeadSpace2
4.   Meta Robots WordPress plugin
5.   SEO friendly and HTML valid subheadings
6.   SEO Post Link
7.   SEO Smart Links
8.   Sitemap Generator

If I use wordpress site, I will surely use these plugins.

Yes, I agree all the mentioned plugins are very effective.

Some are new plugins for me. I will definitely try these plugins. Thanks.

I will have to redesign my website in Wordpress. I am using Weebly and it has none of this sort of plugin benefits.

I was searching for such kind of stuff and I found it here.Thanks a ton for sharing.

Yes, These SEO plugins are best. I have used some of them but you can also try Trash Duplicate and 301 Redirect Pro which is also good SEO related plugin.

Yes, all plugins are very effective.

Best WordPress SEO Plugins
1. All In One SEO Pack.
2. SEO Ultimate.
3. The SEO Framework.
4. Broken Link Checker.
5. Redirection.