Desktop Outliners
| Name | Operating system | Notes |
|---|---|---|
| Acta | Mac OS 9 | Single pane outliner, free to download |
| ActionOutline | Windows | Double-pane outliner. Multiple outlines per file, selected via 'worksheet-style' tabs. |
| AllMyNotes Organizer | Windows | Can password-protect file access, supports Skins. Free and Portable editions available. |
| Bonsai (Desktop Edition) | Windows | Designed to synchronise with the Palm OS version of Bonsai |
| Circus Ponies NoteBook | Mac OS X | Single-pane outliner designed to resemble a spiral bound notebook |
| Code Browser | Windows/Linux | folding text editor, can outline source code |
| Deep Notes | Mac OS X | Freeware single pane outliner. Only 1.7 megabytes, runs on OS X 10.4 or later. |
| Ecco Pro | Windows | Freeware outliner. EccoMV add-on for RTF pane. |
| Fargo | HTML 5 | Online outliner with Dropbox storage |
| Flashnote | Windows / Mac OS | Freeware outliner with support of notes tree |
| GJots | Linux | |
| GrandView | MS-DOS | Powerful single-pane outliner dating from the 1980s |
| hnb | Linux/platform independent | Terminal based outliner |
| Idea Cruncher | Windows | Minimalist two-pane outliner |
| Idea Rover | Windows | Research paper outliner |
| In Control | Mac OS 7/8 | Vintage outliner from Attain Corp, which could sort or filter outlines according to keywords or metadata attached to each topic. |
| InfoQube | Windows | Two-pane outliner with custom columns, rich-text formatting, and several concepts based on EccoPro. |
| Jot+ Notes | Windows | Two-pane outliner where the 2nd pane supports Rich Text formatting and embedded pictures and objects, such as spreadsheets. One can navigate not only via the topic hierarchy in pane one, but also via hyperlinks in the text of pane two. |
| Jreepad | Platform independent | Compatible with Treepad. Written in Java. |
| KeepNote | Windows/Linux/MacOS | Notes saved in HTML. Written in Python. |
| KeyNote | Windows | Mozilla Public License. No longer supported. |
| KeyNoteNF | Windows | Mozilla Public License. Evolution of KeyNote. |
| KJots | Linux | |
| Maxthink | Windows 2000, ME, XP, Vista, 7, 8 | Venerable MSDOS outliner now in Windows |
| MORE | Mac OS 7/8/9 | Classic Mac outliner from the late 1980s & early 1990s |
| MSD Organizer | Windows | Single-pane outliner in the following modules: Contacts, Cards, Budget, Property, Health and Music. |
| MyInfo | Windows | Two-pane, but can emulate basic one-pane outliner as well. |
| myBase | Windows | Tree-based free-form outliner and database system with three panes. |
| Leo | Windows/Linux/MacOS | Python application (uses Qt or Tk for the UI) |
| Neomem | Windows | Three-pane outliner. Website last updated July 2008. |
| Nethnic Pandora | Windows | Tree-based text editor and project management tool |
| NoteCase | Windows/Linux/MacOS | No longer supported. |
| NoteCase Pro | Windows/Linux/MacOS | |
| NoteKeeper | Windows | Lightweight freeware two-pane outliner |
| Noteliner | Windows | Lightweight freeware outliner with "to do" capabilities, tagging & tables |
| OutWiker | cross-platform | Desktop wiki and outliner. Notes are stored as a directory tree on disk. |
| OmniOutliner | Mac OS X | Single/double pane outliner with columns and extensive customisation capabilities. |
| Opal | Mac OS X | Single pane outliner, essentially a port of 'Acta' to Mac OS X |
| OPML Editor | Mac/Windows | GPL |
| OrgMode | cross-platform | Emacs outlining mode |
| Outliner Lighto | Windows | Free software, console-based outliner written in FreePascal |
| Redhaven Outline | Windows | Lightweight freeware two-pane outliner |
| Sain Outliner | Windows | Low cost, very simple single-pane outliner |
| Scrivener | Mac OS X; Windows & Linux beta | Flexible content generator for writers; powerful multipane outliner |
| SEO Note | Windows | Free lightweight two-pane outliner |
| The Guide | Windows | Free lightweight two-pane outliner |
| ThinkTank | MS-DOS | Early PC outliner, now abandonware |
| Tkoutline | Platform independent | Written in Tcl/Tk |
| ToDoList | Windows | Free (Eclipse Public License). Portable. Large number of node attributes. French and Spanish versions. |
| Tombo | Windows, Windows CE, Windows Mobile | Minimalistic. Regex search. GPLv2. |
| Total Text Container | Windows | Freeware 2-pane outliner |
| Tree | Mac OS X | A lightweight, horizontally expanding outliner that exports to many formats. |
| Treeline outliner | Windows/Linux | Free 3-pane outliner; 2nd pane shows details of highlighted node, 3rd pane lists details of its children. |
| Treepad | Windows/Linux | Two-pane outliner. Free and paid versions. |
| TuxCards | Linux | Freeware 2-pane outliner |
| The Vim Outliner | cross-platform | Vim plugin |
| UV Outliner | Windows | Free, single pane outliner |
| Vault 3 | Windows, Linux, Mac OS X, Android | Free outliner. XML import and export. PDF export. Optional 128-bit AES encryption. |
| Vim Outliner | cross-platform | Vim plugin |
| VOoM | cross-platform | Vim plugin, emulates two-pane outliner. Requires Python and Vim compiled with Python interface. |
| WhizFolders | Windows | Two-pane outliner |
| WikidPad | cross-platform | Wiki-like outliner. |
| XLnotes | Windows | Microsoft Excel add-in that allows to take notes which contain Word documents, web pages and attachments. Emulates two-pane free form outliner. |
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