Jon Christopher

Breadcrumbs are often generated from Page structure, but in a world of Custom Post Types that doesn’t always work. Menu Breadcrumb uses your WordPress Menu to generate a breadcrumb trail based on the current page.
<a href="https://github.com/jchristopher/menu-breadcrumb" rel="nofollow ugc">View on GitHub!</a>

Menu Breadcrumb

Generate a breadcrumb trail from a WordPress Menu

Nitin Yawalkar

RDFa Breadcrumb provide links back to each previous page the user navigated through to get to the current page or – in hierarchical site structures – the parent pages of the current one.
It gives you a new template tag called <code>rdfa_breadcrumb()</code> that you can place anywhere in your template files. It has inbuilt RDFa content markup, so this will help Google to recognize and display the breadcrumbs on search results as well.
Check out the screenshots.

RDFa Breadcrumb

An easy template tag for showing a breadcrumb menu on your site and on google search results with built in RDFa Markup.

Menu Breadcrumb vs RDFa Breadcrumb