!macdependency
Clone of http://code.google.com/p/macdependency/
This is an updated version that (should) compile on OSX 10.7 and later
Licence LGPL
MacDependency shows all dependent libraries and frameworks of a given executable, dynamic library or framework on Mac OS X. It is a GUI replacement for the otool command, and provides almost the same functionality as the Dependency Walker (http://www.dependencywalker.com) on Windows.