Custom Breadcrumbs 2 (6.x-2.x and 7.x-2.x)
Many new features have been added including support for Views, Panels, Taxonomy vocabularies and terms, paths, and a simple API that allows contributed modules to enable custom breadcrumbs for module pages and theme templates. These are implemented using optional, independent submodules that depend on the main Custom Breadcrumbs module.
In addition to breadcrumb visibility, this version provides an option permitting PHP code snippets to be used in forming the breadcrumb titles and paths. Multiple languages are also supported.
Any changes must go in the 7.x version first.
Custom Breadcrumbs 1 (6.x-1.x and 7.x-1.x)
Allows administrators to set up parametrized breadcrumb trails for any node type. This allows CCK-style node types to have "Home > User Blog > 2005 > January" style breadcrumbs on the node view page itself, synchronizing cleanly with custom views or pathauto aliases. Breadcrumb visibility can be customized via a php snippet.
There are no maintainers doing any work on these branches, so please switch to version 2! :) If, for some reason, you'd like these branches maintained, please offer to become a co-maintainer to work on them.
There is also the Path Breadcrumbs (PB) module. We are trying to determine what the similarities and differences are. Please help by getting involved in #1823080: Explain difference between Path Breadcrumbs and Custom Breadcrumbs. It may be possible to merge projects and deprecate one of them if we can get this sorted out.
Update: We're considering deprecating this module in favour of PB. Please add any Custom Breadcrumbs (CB) features that are missing from PB to the ticket above. If you have any comments on this initiative, please discuss over there. Thanks!