Meta Box AIO is a package, that allows you to Create WordPress custom fields and meta boxes in any possible combination you can imagine.

The WP Meta SEO plugin gives you a full control over your WordPress website's SEO with accurate & advanced tools. WP Meta SEO comes with time-saving tools, including: a meta information bulk editor, an image SEO optimization, a powerful XML sitemap generation and a redirect manager.

Easy Meta is simple easy and powerful joomla! extension allows you manages meta data and add semantic data in you website page's head. it contains predefined Open Graph, Facebook, Twitter, Google, Dublin Core and other SEO tags.

Xbox is a complete and powerful framework to create beautiful, professional and flexibles Meta boxes and Admin pages or Theme Options.

Wordpress Meta Data & Taxonomies Filter (MDTF) is a plugin for searching and filtering WordPress content - posts and their custom types by taxonomy and metadata fields.