Powerful AJAX-based search alternative which supports faceting queries by taxonomies, terms, location, and post metadata.
Media Metadata Workflow Wizard: Integrate your media metadata workflow with WordPress's Media Library
Easily create keywords, descriptions and headings based on the content of your page.
Easily add custom fields to nav menu items.
Enhances the Media Library; powerful [mla_gallery], taxonomy support, IPTC/EXIF/PDF processing, bulk/quick edit actions and where-used reporting.
Add basic meta tags and also Opengraph, Schema.org Microdata, Twitter Cards and Dublin Core metadata to optimize your web site for better SEO.
Scriblio enables faceted searching and browsing of WordPress posts, pages, and custom post types.
This plugin provides integrated navigation for your website. Use WordPress as a CMS for your website and think in navigation terms (main, sub etc.)
Customise the way your post/page will be displayed on the major social media through the Open Graph Protocal (OGP).
Configure over 100 separate on-page SEO characteristics. Load under 700 lines of code per page view. No junk: just high performance SEO at its best.
Adds Creative Commons license information to your posts, pages, attachment pages and feeds. Fully customizable.
Infrastructure plugin which implements metadata functionality for taxonomy terms, including for tags and categories.
Simple SEO is a quick way to add HTML meta tags to your site and pages using WP integrated custom fields feature.
Edit SEO tags (or any custom field) from the All Posts page. Auto-detects SEO plugins & themes.
This plugin allows you to add facebook open graph protocol to your blog
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