I'm not a Mac user but this may be of interest to those who are -

http://www.cultofmac.com/141251/tree-outliner-helps-you-think-laterally-with-its-sideways-view-review/

Hi, Jim,

For those interested and who might have missed it, I wrote a review of Tree for Mac Appstorm last summer. Here is the link:

http://mac.appstorm.net/quick-look/productivity-quick-look/tree-a-new-dimension-in-outlining/

Steve Z.