(TL;DR) Gretel is a Ruby on Rails plugin that makes it easy yet flexible to create breadcrumbs.
It is based around the idea that breadcrumbs are a concern of the view, so you define a set of breadcrumbs in config/breadcrumbs.rb (or multiple files; see below) and specify in the view which breadcrumb to use.
Gretel also supports semantic breadcrumbs (those used in Google results).
Have fun! And please do write, if you (dis)like it – firstname.lastname@example.org.
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