The PDE „Dependency Visualization“ plugin for eclipse is a very cool plugin to get a overview of the dependencies of a OSGi application. I think the plugin give a much clearer overview of the direct and indirect dependencies of an OSGi bundle then the old tree based PDE plugin does.
Example: Old PDE Dependency Plugin Tree Based:
Example: New PDE Dependency Visualization Plugin - Dependencies as Visualization:
Here the project website of the PDE Incubator Dependency Visualization plugin.