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.

shra

Breadcrumb is a way for visitors keep track thier location. The plugin implements few main ideas: 
* Menu is a key to all site structure. 
* Possibility <code>to mount</code> groups articles to defined points of site tree. 
* Possibility to drive breadcrumb.
The key feature is configuring breadcrumb by defining special rules. It can looks like this: 
 front menu:fin tax:post_tag current 
Where each token define part of trail.

Genzel breadcrumbs

Breadcrumbs nav links. Based on WP menu, can be configured and hooked. Use special rule tokens to determine behaviour of trail.

RDFa Breadcrumb vs Genzel breadcrumbs