OutlineEdit!

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 syncs with mobile apps.

A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.

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 applications is the ease with which you can cross-link your information. Links in a wiki are created by typing in WikiWords. A WikiWord is any mixed case word typed into the editor. TodoList or JohnDoe are example WikiWords. The term wiki means "quick" in Hawaiian, and wikis are all about quickly linking your information together. Wikis are not a new concept, in fact there are many web based wiki servers avai »

Org-mode is for keeping notes, maintaining ToDo lists, doing project planning, and authoring with a fast and effective plain-text system.

Make lists and get organized. TaskPaper is a plain text to-do list that’s surprisingly adept.

Moo.do is designed to be the best and easiest way to keep your life and thoughts organized: projects, to-do lists, appointments, contacts, reminders, events, and anything else you want to write down. As all modern apps should be, Moo.do is available on any computer, tablet, or phone and synchronizes all devices and users in realtime.

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, TODOlists, research notes, journal entries, paper outlines, etc in asimple notebook hierarchy with rich-text formatting, images, and more.Using full-text search, you can retrieve any note for laterreference.

germ.io is a project management tool that is centered around ideas and taking them through to execution.

UV Outliner is a small and powerful single-pane outliner. It is intended for creating, organizing, and collecting information.

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.

Outliner for notes and tasks in plain-text

Tkoutline is a single pane, cross-platform outline editor written in Tcl/Tk . With this editor, information can be structured hierarchically in an outline and outlines can be hyperlinked together to create a web of outlines.

FoldingText is the markdown text editor with productivity features. Unlike other editors, FoldingText does outlining, todo lists, and more.

Cross-platform app for Mac, iPhone, iPad, and iPod Touch. Sync outlines between computers and devices with iCloud. Sync outlines with Evernote, Import and export outlines in OPML format.