Apps with 'Hierarchical Structure' feature

Obsidian is a note-taking app that lets you create a personal knowledge graph with ease. It is designed for non-linear thinking and allows you to easily link your notes together wiki-style.

Open source note-taking app with Markdown support, to-do integration, and synchronization with cloud services like Dropbox and OneDrive.

Highly customizable browser with built-in ad and tracker blockers, Chromium compatibility, advanced tab management, cross-device sync, and strong privacy features.

Disk analysis tool with treemap views, duplicate file detection, and cleanup actions. Works offline and ad-free on Windows as an open-source project.

Privacy-focused diagramming software supporting real-time collaboration, offline mode, and cloud storage without ads or registration.

Local-first, privacy-focused notebook supporting Markdown and Org mode, offline use, encrypted backup, extensible with plugins, and more.

Organizes notes, tasks, and projects offline using Markdown, P2P syncing, and encrypted storage, complemented by dynamic collections on all devices.

Streamline teamwork with real-time collaboration, drag-and-drop content organization, and visual simplicity across notes, tasks, wikis, and databases.

Fully open-source, end-to-end encrypted notes with device-based security, secure sync, offline access, powerful editor, vault, backups, and exports.

Comprehensive writing tool for notes, citations, and drafting with privacy-first features and multi-language support, perfect for diverse writing tasks.

Emphasizes privacy with end-to-end encryption, Proton Drive safely stores, synchronizes, and shares files across devices via web and mobile applications.

Modern Windows file manager with tabbed browsing, dual-pane view, column navigation, integrated archive tools, file tagging, QuickLook support, and appearance customization.

Microsoft OneNote, part of the Microsoft 365 Copilot, is a digital notebook application that gives people one place to gather notes and information. It also offers shared notebooks, syncing between multiple computers and devices via Windows...

Zim brings the concept of a wiki to your desktop. Store information, link pages and edit with WYSISYG markup or directly typing some lightweight markup syntax and see it previewed as-you-type. Creating a new page is easy by either clicking on the "Create new note"...

Geany is a powerful, stable and lightweight programmer's text editor that provides tons of useful features without bogging down your workflow.

Open-source, privacy-focused workspace merging notes, tasks, project management, Kanban, Pomodoro timer, interactive whiteboard, and real-time collaboration.

Manages tasks across all platforms with advanced language recognition. It integrates with 60+ tools, and offers templates for various projects.

Beyond coding. We forge. Forgejo is a self-hosted lightweight software forge. Easy to install and low maintenance, it just does the job.

Free, open-source note-taking with rich text, cross-platform support, syntax highlighting, embedded files, and customizable interface.

The original trilium is transfered to this repo by its owner and the app continues to develop here as stated here: https://github.com/TriliumNext/Trilium

Privacy-focused, cross-platform tool for tagging, browsing and managing files or folders, with note-taking, Kanban, S3 cloud support, and web clipping.

Anki flashcards on Android. Your secret trick to achieve superhuman information retention.

GNU Emacs is an extensible, customizable text editor—and more. At its core is an interpreter for Emacs Lisp, a dialect of the Lisp programming language with extensions to support text editing. The features of GNU Emacs include:

Tasks is libre open-source software, based on the original source code from the popular Astrid Tasks & To Do List! Tasks is easy-to-use, feature-packed, flexible and customizable, and synchronizes with a variety of services.

Provides infinite text-based nested lists, real-time collaboration, tagging, file uploads, kanban boards, offline access, and seamless sync across devices.