...little nice outliner :

http://www.2brightsparks.com/infohesive/features.html

I did'nt tested it yet, but I'm using Synckback SE (backup software) from the same company, and it's a very reliable software.
So...

Sincerly,
Christophe.

It was reviewed here before:
http://www.outlinersoftware.com/topics/viewt/650/0/infohesive

From the history of changes though, it has been improved significantly since.