digrart

This plugin generates breadcrumb navigation for all posts, pages, custom post types, categories, and taxonomies on WordPress. The breadcrumbs are fully customizable and support structured data formats such as Microdata and JSON-LD for better SEO.

dig Breadcrumb

Generate breadcrumb navigation for all posts, pages, custom post types, categories, and taxonomies on WordPress, considering their publication status.

Ali Khalili

RDFa Content Editor (RDFaCE) is a plugin for TinyMCE rich text editor. 
RDFaCE is an implementation for WYSIWYM (What You See Is What You Mean) concept. 
It enables end-users to easily annotate their blog posts using RDFa and Microdata markups. 
This special edition focuses on Schema.org schemas for improving SEO (Search Engine Optimization). 
For more info visit RDFaCE project page at http://rdface.aksw.org/ or watch the WYSIWYM concept video at http://youtu.be/wxtlAol4HB0

RDFaCE

Enables semantic content authoring based on RDFa and Microdata (Schema.org).

dig Breadcrumb vs RDFaCE