PickWalk is an add-on for Blender which lets you navigate through a hierarchy of objects or bones of an armature, similar to how pickwalking works in Autodesk Maya.
It also allows for walking over vertices and points of meshes and curves in edit mode.
Pickwalk extends the basic navigation of Blender in the outliner and makes it much more powerful. The default navigation in Blender is limited to the outliner and jumping between different hierarchy levels can sometimes skip objects.
The add-on works in the 3D View, Outliner, Graph Editor and Dope Sheet.