"Meta Accelerator" can speed up metaquery.
Simple and easy to use wordpress plugin to add the meta description tag in html head
Implements attachments upload to the topics and replies in bbPress plugin through media library and adds additional forum based controls.
Magic Meta Box helps you to create easily custom meta boxes fields in post, page and custom post type. You can create repeated group fields and tabs.
Add Favorite or any flag button to your posts. The easy way
Simple and easy way to optimize your wordpress website for search engines and social media websites
Limit number of characters or words entered for text and textarea fields in meta boxes.
Generate Twitter Cards for tweets linking posts
Customize maps in your post, pages and widgets. Add geotag to your blog and site. Use GPX, KML, CSV, TXT ...
Improve Your Website Traffic by Using WordPress On-Page SEO Plugin and Get On the First Page of Google.
Adds a title field and a rel="nofollow" checkbox to the insert link popup box.
Easy SEO for noobs and experts: The plugin is your helping hand in WordPress on page search engine optimization.
Improves your blog's search engine optimization by "noindexing" pages you choose. Now also for page-based (as opposed to date-based) ar
Search engine optimization made easy: make your content more visible in search engine results.
Simple and effective SEO. Non-invasive, elegant. Ideal for client facing projects.
Provides some essential site features: Google analytics, popular posts widget, random post widget, contact form short code, easily modify wp_head.
A WordPress plugin which gives you all of your custom fields in a single, customizable spreadsheet view.
Cleanup Duplicate Meta gives you a tool to check for and delete duplicate Post and/or User Meta entries in the database tables.
Edit SEO tags (or any custom field) from the All Posts page. Auto-detects SEO plugins & themes.
Adds a checkbox in the insert link popup box for including rel="nofollow" in links as you create them; as well as other tools that provides
This plugin provides a simple [meta] shortcode that allows you to fetch meta information for the current $post.
The Custom Field Template plugin extends the functionality of custom fields.
The Open Graph Protocol enables any web page to become a rich object in a social graph. This plugin renders meta tags within an extension framework.
Plugin ended. view MUST-HAVE PLUGINS: http://bitly.com/MWPLUGINS
WP Social Meta generates/adds necessary social meta tags for every pages and posts. It increase traffic to your website through social networks.
Block Pinterest is a simple wordpress plugin to disallow pinterest using your blogs pictures or contents on the pinterest site.
A plugin for adding source links to your Post. Supports Page and Custom Post Type also.
The pluginplug-in, with two additional SQL queries, joins the original data sample $wp_query->posts all meta fields, all files and images.