Alternatives to TreeLine for all platforms with any license

WorkFlowy

List-making software with infinite levels of indentation, giving you the flexibility of infinite layers of organization.

Freemium $ $ $ Web Android iPhone Android Tablet iPad
Hierarchical structure Infinite hierarchical depth Export to OPML Notetaking ... Outline mode Task Management Cloud sync Data export/import Full text search Multi Column View Import feeds from OPML Outline organization Outliner Real time collaboration Todos Tree structure Tree view Zoom integration Add a feature

226 Like
Orgzly

You can keep notebooks stored in plain-text and have them synchronized with a directory on your mobile device, SD card, Dropbox, or over WebDAV. Create, edit and...

Free Open Source Android Android Tablet
Sync with Dropbox To-Do management Todos Add a feature

26 Like
Moo.do

Moo.do is a notepad, a to-do list, and an outliner, but with advanced features that make the cloud-based application much more useful than any of those tools would be on...

Freemium Web Android iPhone Chrome OS
Calendar integration Gmail integration Google Drive integration Notetaking ... Outliner Real time collaboration Time Scheduling Todos Add a feature

42 Like
Checkvist

A professional list-making tool. Minimalist, keyboard-centric online outliner and task management application. Free sharing, unlimited lists, free import and export....

Freemium $ $ $ Web Android iPhone iPad Software as a Service (SaaS)
Support for Keyboard Shortcuts Content Filtering Integrated Search Outliner ... Save Attachments Streamlined interface Wiki-like local linking Checklists Cloud sync Infinite hierarchical depth Keyboard centric Keyboard focused MarkDown support Outline organization Outliner Real time collaboration Todos Add a feature

54 Like
XML Copy Editor

XML Copy Editor is a fast, free, validating XML editor. * DTD/XML Schema/RELAX NG validation * XSLT * XPath * Pretty-printing * Syntax...
- Discontinued
  The program is no longer updated. Last version, 1.2.1.3, released in September 2014, can be still downloaded from the official website
Free Open Source Windows Linux
Syntax Highlighting Add a feature

27 Like
UV Outliner

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...
- Discontinued
  The program is no longer updated. Last version, 2.4.4, released in October 2012, can be still downloaded from the official website.
Free Windows
Notetaking Outliner Task Management Todos Add a feature

33 Like
TreePad

A free and lightweight outliner, only 465KB in size. It allows you to store all your notes, emails, texts, hyperlinks, etc. into one or multiple plain-text databases....
- Discontinued
  The treepad website is no longer available. You can still find the program at https://web.archive.org/web/20190720190155/http://www.treepad.com/treepadfreeware/
Free Personal Windows Linux Wine Raspberry Pi
Outliner Lightweight Notetaking Portable ... Todos Add a feature

29 Like
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...

Commercial Mac iPhone iPad
Multi Column View Outliner Programmable Notetaking ... Export to OPML Import feeds from OPML Outline folding Outline organization Styles based on outline hierearchy Task Management Add a feature

34 Like
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XML Notepad

XML Notepad provides a simple intuitive user interface for browsing and editing XML documents. Handy features include: * Tree View synchronized with Node Text...
- The tree view based on the Norton utilities model is superb. Guest • May 2020
Free Open Source Windows
Hierarchical structure Add a feature

17 Like
Altova XMLSpy

Altova XMLSpy is the industry's best-selling XML editor and development environment for modeling, editing, transforming, and debugging XML-related technologies. It...

Commercial Windows
Debugger Add a feature

15 Like