OmniOutliner

wikidPad is a Wiki-like notebook for storing your thoughts, ideas, todo lists, contacts, or anything else you can think of to write down. What makes wikidPad different from other notepad …

Workflowy lets you organise your brain into easily manageable lists. It also works as a single-pane outliner with inline notes. It offers one-click hoisting (zooming into branches). The online version …

KeepNote: note-taking and organization. KeepNote is a note taking application that works on Windows, Linux, and MacOS X. With KeepNote, you can store your class notes, TODO lists, research notes, …

A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file. The following languages are supported: Chinese Simplified (Channing Wong,...

UV Outliner is a small and powerful single-pane outliner. It is intended for creating, organizing, and collecting information. With UV Outliner you can create plans, schedules, and to-do lists, collect …

Tree is an outliner featuring a horizontally expandable tree view. Tree assists you in organizing your information, sketching plans and brainstorming new ideas. Tree allows you to store your ideas …

NeO is a powerful outliner built for OS X. Using NeO, you can efficiently manage and organize pieces of information. NeO supports basic outliner facilities, such as creating, moving, sorting, …

The Outliner of Giants is a feature rich outline processor designed to support the creation and management of large corpuses of information, such as those generated by students, researchers, writers …

Opal lets you organize just about anything — ideas, reports, lists, notes, projects, graphics — in the form of an outline. If you used Acta, you’ll love Opal.

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 …