Presenting hierarchial records

Aside from using a treeview how do you guys presents hierarchial records with at least just 3-level hierarchy? I am contemplating on a flexible one wherein I could probably double click a certain parent and have its child display in another form or control, for now I am using my own custom control which is a listview with a treeview capability but it has its own problems for now.

I just want the best methods of presenting hierarchies that is, so how do you guys do it?