One of the most downloaded WordPress plugins (over 30 million downloads since 2007). Use All in One SEO Pack to optimize your site for Search Engines.
An easy to use XML sitemap generator with support for image and video sitemaps for WordPress.
Improve your site's SEO with the best solution for completely Search Engine Optimizing images and dynamically fixing HTML validation errors.
Boost your wordpress SEO: Full SEO features Meta Tags, webmaster tool, Social AuthorShip, XML Sitemap, Image SEO, Super Fast Automated SEO
A light and simple plugin to insert automatically ALT & TITLE tags into Gravatar images in your site.
Smart image SEO for WordPress sites. Passively build links back to your site by letting other webmasters embed your images in their site.
THIS PLUGIN IS AN OLD UNSUPPORTED VERSION, FOR NEW VERSION SEE SEO Image Tags (https://wordpress.org/plugins/seo-image-alt-tags/)