Apps similar to OmniOutliner include CherryTree, which is free and open source. Other options are Workflowy, TreeSheets, Manuskript and Dynalist. Note-taking Tools like OmniOutliner are a crowded field, with more than 50 alternatives for Mac, Windows, the web, Linux and iPhone.
Hierarchical note-taking software that is free, open-source, cross-platform. Features include rich text, syntax highlighting, multi-level lists, embedded files, customizable interface, code execution, PDF export, spell check, images & tables, and comprehensive project management support.
Offers limitless nested lists for outlining, instant sync on web and mobile, real-time collaboration, file and photo uploads, kanban boards, tagging, offline editing, hoisting for branch focus, content sharing, text highlighting, and Dropbox auto-backup.
United States
A "hierarchical spreadsheet" that is a great replacement for spreadsheets, mind mappers, outliners, PIMs, text editors and small databases.
Netherlands
EU
Open-source software offering a hierarchical outliner, distraction-free editor, character management, plot tools, Snowflake method support, section multi-organization, customizable writing workflows, cross-platform availability, and export to standard formats.
FranceEU
Dynalist is a web app that lets you break down and organize your thoughts in the format of lists.
United States
Org mode is for keeping notes, maintaining TODO lists, planning projects, and authoring documents with a fast and effective plain-text system.
GermanyEU
The powerful, full-featured Personal Information Manager for Windows offering Email, Synchronization, Portability, Network support, Android and iOS versions.
EstoniaEU
Working on a project, researching a topic or writing an article? Walling makes it easy to break down your ideas, refine them and visually organize them.
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 where you would expect them to be.
Australia
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.
GermanyEU
Tana's combination of simple concepts lets you build anything. Easily turn raw notes into tasks, bugs, follow-ups and more with Supertags. Everything in Tana is connected in a graph, so you can leave files and folders behind. Data flows to where it needs to be.
Free, open-source writing app for fiction writers who outline. Each scene opens with its beats, characters and notes beside the draft. Imports Scrivener, Plottr, yWriter, Obsidian and novelWriter. No AI, no subscription, no account.
Canada
