OmniOutliner

OmniOutliner is a start-to-finish writing app. Perfect for collecting information, outlining Big Ideas, adding structure to any sort of writing, and much more. From grocery lists to email drafts to long-form composition.

Commercial Mac OS X iPhone iPad

Orgzly

Outliner for notes and tasks in plain-text.

Free Open Source Android

OutlineEdit

A beautifully crafted outliner for your Mac: It helps you keep your ideas structured and collected. Use OutlineEdit as an empty canvas to sketch information - for...

Commercial Mac OS X

Deep Notes

Deep Notes is a simple hierarchical note pad. You can use it to outline ideas, make to-do lists, or whatever else might need jotting down in a list, hierarchical or not....

Free Mac OS X