Alternatives to OmniOutliner for Windows with any license

CherryTree

A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.
- The thing I love about OmniOutliner is the fact that each row of data in the hierarchy can have multiple columns, which is very convenient UI for structured data. CherryTree doesn't support this. Guest • Dec 2017 • 4 agrees and 1 disagrees
Free Open Source Windows Linux PortableApps.com
Hierarchical structure Infinite hierarchical depth Code formatting Data portability ... Export to HTML Folder Tree Integrated Search Multiple languages Password encryption Portable Rich text editing Export to PDF Syntax Highlighting Tablet support Tree view Add a feature

187 Like
Notion

With so many tools, it's hard to keep everyone on the same page. Notion is a new tool that unifies them all. It's like Google Docs, but everything is...

Freemium $ $ $ Mac Windows Web Android iPhone ... iPad
MarkDown support Nested Notes Real time collaboration Wiki-like interface ... Collaborative writing Data first Drag n drop Embedded media Google Drive integration Integrated Search Kanban boards Knowledge base Latex Math Support for @mentions Nested lists Real time collaboration Real time editing Slack integration Student discount Syntax Highlighting Team Collaboration To-Do management Youtube integration Add a feature

97 Like
Dynalist

Dynalist is a web app that lets you break down and organize your thoughts in the format of lists.

Freemium $ $ $ Mac Windows Linux Web Android ... iPhone
MarkDown support Search by tags Night mode/Dark Theme Color coding ... Cross Linking Google Calendar integration Hierarchical structure Support for Keyboard Shortcuts List management Night mode/Dark Theme Works Offline Outline mode Tags Support Add a feature

74 Like
Org mode

Org mode is for keeping notes, maintaining TODO lists, planning projects, and authoring documents with a fast and effective plain-text system.
- Orgmode is not tailored to writing but more to organizing. Guest • Feb 2016 • 0 agrees and 6 disagrees
Free Open Source Mac Windows Linux
Customizable Command line interface Emacs integration Export to HTML ... Extensible by Plugins/Extensions Hierarchical structure Hierarchical tagging Infinite hierarchical depth Lightweight Plain text file Portable Privacy focused Search by tags Tag based Add a feature

69 Like
wikidPad

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...

Free Open Source Mac Windows Linux BSD
Cross Linking Wiki-like interface Add a feature

155 Like
NixNote

NixNote, formerly Nevernote, is an open source client for Evernote .
- NixNote and Evernote don't support outliner functionality. you can make an indented bullet list that looks like an outline, but outline features like reorganizing items, OPML export, etc. are missing. Guest • Sep 2018
Free Open Source Mac Windows Linux
No features added Add a feature

97 Like
Manuskript

Open-source tool for writers. With outliner, character management, plot development, distraction-free editor, etc.

Free Open Source Mac Windows Linux
Distraction free writing Export to ePub MarkDown support Export to PDF ... Social media collaboration Visual timeline Wordpress integration Add a feature

47 Like
EssentialPIM

The powerful, full-featured Personal Information Manager for Windows offering Email, Synchronization, Portability, Network support, Android and iOS versions.

Freemium $ $ $ Windows Android iPhone
Portable Add a feature

59 Like
MyLifeOrganized

MyLifeOrganized (MLO) is a personal task outliner and to-do list manager which will help you to organize your goals, projects and tasks into a tree. The To-Do list...

Freemium Windows Android iPhone Android Tablet iPad ... Apple Watch
Hierarchical structure Add a feature

82 Like
Piggydb

Piggydb is a Web notebook application that provides you with a platform to build your knowledge personally or collaboratively. With Piggydb, you can create highly...
- Discontinued Development has shifted from Piggydb to Cotoami. https://piggydb.net/2017/04/04/piggydb-oinker-cotoami-we-need-your-help/
Free Open Source Mac Windows Linux Self-Hosted
Real time collaboration Add a feature

50 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.
- It behaves like OmniOutliner but with much fewer features. Guest • Nov 2015
Free Windows
No features added Add a feature

31 Like
germ.io

germ.io is a project management tool that is centered around ideas and taking them through to execution. germ features a visual outliner to create detailed...
- Discontinued No registrations not accepted. Facebook page updated in 2015.
Free Personal Mac Windows Linux Web Android Tablet ... iPad
Real time collaboration Add a feature

21 Like
Memento

Memento is a personal database that allows you to store all personal data in one place. Collections, purchases, inventory, recipes, tasks – let Memento handle all that....

Freemium Windows Android Java
No features added Add a feature

21 Like
KeepNote

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...
- Discontinued No new releases since March 2012, but last version, 0.7.8, is still working and can be downloaded from the official website.
Free Open Source Mac Windows Linux PortableApps.com
Portable Add a feature

69 Like
Quoll Writer

Focus on your words not the interface. Quoll Writer is a writing application that helps you focus on your words. Clean and uncluttered. Feature rich. Features are...

Free Open Source Windows
Distraction free writing Fullscreen support Export to ePub Export to PDF ... Tabbed interface Writing assistance Writing statistics Writing suggestions Add a feature

17 Like