Take outlines as an example. Most of us were taught to use the typical hierarchical outline of the collapsing tree variety. Most of us probably haven’t used an outline since, though their value increases in many chosen careers.
Here’s a look at a Mac outliner with the standard hierarchical, collapsible and expandable tree variety. It’s called Tree but it takes outlines in an entirely different direction. Instead of just being a vertical outliner, Tree can outline horizontally.
Here’s a screenshot of Tree in the standard vertical outline mode.
In vertical mode Tree works much as you would expect any digital outliner to work but with all the typical Mac bells and whistles.
For example, Tree can open plain text, rich text, and OPML (the XML format for outliner apps) files. It handles notes, numbering, colored labels, checkboxes, and a tab bar which is good to focus in on a specific section of an outline without additional distractions.
The claim to fame in Tree is the horizontal view which brings all sorts of visual opportunities to the time honored outliner.
Tree’s horizontal view is sufficiently unique that it takes some extra thought to figure out new ways to use it. Vertical is fine and has worked well for me, but I find that horizontal model is better for viewing processes, procedures, and methods. And all it takes is a click to get there.
Here’s the only real issue I see in Tree is the Mac App Store’s lack of a try-before-you-buy option, but fortunately the Tree developer has a trial version available, which is highly recommended.