Breadcrumb Navigation For Cocoa

Is there an open source implementation of a breadcrumb navigation for the Cocoa framework? Those path bars seem to gain more attraction these days (used in Transmit or Instinctiv) but the implementations I found are closed sourc开发者_StackOverflow中文版e.

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Check out @Perspx's PXNavigationBar. The source is available on Github.

You may also want to check out NSPathControl.