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
Infinite hierarchical depth Export to OPML Cloud sync Data export/import ... Full text search Hierarchical structure Import feeds from OPML Outline mode Outline organization Real time collaboration Tree view Zoom integration Add a feature

210 Like
Checkvist

A web tool for creating online outlines, hierarchical task lists, collecting, and structuring all kinds of information.

Freemium $ $ $ Web Android iPhone iPad Software as a Service (SaaS)
Support for Keyboard Shortcuts Cloud sync Infinite hierarchical depth Keyboard centric ... Keyboard focused MarkDown support Outline organization Real time collaboration Add a feature

53 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 Real time collaboration ... Time Scheduling Add a feature

37 Like
Orgzly

Outliner for notes, tasks and to-dos.

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

17 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 Discontinued in 2014.
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- Discontinued The program is no longer updated.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
No features added Add a feature

31 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....

Free Personal Windows Linux Wine Raspberry Pi
Lightweight Portable Add a feature

28 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
No features added Add a feature

15 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
Export to OPML Import feeds from OPML Outline folding Outline organization ... Styles based on outline hierearchy Add a feature

32 Like
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...

Free Open Source Windows
Hierarchical structure Add a feature

16 Like
Tkoutline

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...

Free Open Source Windows Linux
No features added Add a feature

6 Like
<oXygen/> XML Editor

<oXygen/> XML Editor is a cross platform XML Editor providing tools for XML authoring, XML conversion, XSL, XSLT, XQuery, XML Schema, DTD, Relax NG and Schematron...

Commercial $ $ $ Mac Windows Linux
JSON Pretty Print XML Diagram Add a feature

18 Like
Foldout

The single-pane outliner that Windows users have been searching for for years, free! Extensive keyboard commands make outlining a fast-paced and smooth experience.

Free Windows .NET Framework
Import feeds from OPML Add a feature

3 Like
Outliner

Organize shopping lists, tasks, todo-lists, ideas and all kinds of memos. Or use it as a project management tool. Do it in a tree-structure with collapsable nodes. ...

Freemium Android
Import feeds from OPML Add a feature

0 Like
Info Select

Info Select is a Personal Information Manager that organizes Internet data, notes, to-do's, schedules, contacts, addresses, forms, ideas, images, and much more. Been...

Commercial Windows
No features added Add a feature

6 Like