Apps to Hierarchical Structure

RedNotebook is a free and open-source desktop journal and diary application offering a clean interface and features for organizing notes, thoughts, and ideas with a calendar view, tag search, and basic text formatting.

OpenNote is a free and open-source web-based note-taking application designed as an alternative to commercial offerings like OneNote and Evernote. It focuses on providing a lightweight yet feature-rich environment for organizing your thoughts and information.

CherryTree is a powerful, free, and open-source hierarchical note-taking application. It allows you to organize your thoughts, ideas, notes, and code snippets in a tree-like structure with rich text editing and syntax highlighting.

Things is a highly acclaimed task manager designed for macOS, iPadOS, and iOS platforms. It offers a clean, intuitive interface to help users capture, organize, and complete their tasks and projects effectively. Praised for its minimalist design and powerful features, Things aims to make personal productivity effortless and enjoyable.

Zoho is a comprehensive suite of online business applications offering solutions for CRM, office productivity, collaboration, IT management, and more. It provides a unified platform to streamline various business operations.

wikidPad is a free and open-source wiki-like notebook application that allows you to store your thoughts, notes, and snippets of information in a highly organized and cross-referenced manner. Its strength lies in the effortless creation of links between pages, making it easy to navigate and connect related ideas.

Freeplane is a powerful and free mind mapping software that allows users to organize ideas, create outlines, and manage information in a hierarchical structure. It leverages the power of visual organization to facilitate brainstorming, project planning, and knowledge management.

Toodledo is a comprehensive online productivity tool designed for managing complex to-do lists, notes, and outlining. It offers a highly customizable approach to task management, supporting methodologies like GTD, and integrates with various third-party services.

Leanote is a versatile self-hosted note-taking application that blends rich text editing with Markdown support. It offers seamless synchronization across multiple devices and features built-in blog publishing capabilities, making it a powerful tool for both personal information management and content creation.

WorkFlowy is a powerful yet simple organizational tool that leverages an infinite nested list structure. It helps users capture, organize, and manage ideas, notes, tasks, and projects through outlining and collaboration, making complex information digestible and actionable.

CintaNotes is a lightweight yet powerful note-taking application for Windows, excelling at capturing and organizing snippets of information quickly. Its focus on speed and hierarchical tagging makes it ideal for managing knowledge, research notes, and simple task lists effectively.

XMind is a leading mind mapping and brainstorming software designed for capturing thoughts, organizing ideas, and managing information effectively. Its intuitive interface and powerful features make it ideal for professionals, teams, and individuals seeking to enhance productivity and creativity.

Nuclino is a unified workspace designed for teams to collaborate, share, and organize knowledge efficiently. It combines wikis, documents, project management, and collaboration tools into a single, intuitive platform, fostering seamless teamwork and knowledge accessibility.

Redmine is a robust and flexible open-source project management web application designed to help teams manage projects, track issues, and collaborate effectively. It offers a wide range of features, including multi-project support, Gantt charts, time tracking, and extensive customization options through plugins and themes.

Zim is a powerful, open-source graphical text editor designed for maintaining a personal wiki or notebook. It allows users to organize notes, ideas, and various types of information in a hierarchical, interlinked structure, similar to a wiki.

Remember The Milk (RTM) is a robust, web-based task and time management application designed to help individuals and teams organize their tasks efficiently. With powerful features like natural language processing, recurring tasks, smart lists, and extensive integrations, RTM simplifies managing your to-do list across multiple devices and platforms.

FreeMind is a robust, open-source, and free mind mapping software written in Java. It's a versatile tool for brainstorming, organizing thoughts, managing projects, and structuring knowledge hierarchically, providing a flexible canvas for visual thinking.

Laverna is a privacy-focused, open-source note-taking application designed for secure personal information management. It offers a robust Markdown editor, strong encryption capabilities, and offline access, making it an ideal solution for users prioritizing data privacy and a seamless note-taking experience across devices.

Microsoft OneNote is a versatile digital notebook application that allows users to capture, organize, and share notes across multiple devices. Offering a freeform canvas, it supports text, handwritten notes, drawings, audio recordings, and embedded media, making it an excellent tool for students, professionals, and anyone needing a flexible note-taking solution.

WinDirStat is a free and open-source disk usage statistics viewer and cleanup tool for Microsoft Windows. It visually represents disk space usage with a treemap display, helping users identify large files and folders to free up space.

Oinker revolutionizes how you manage conversations, tasks, and knowledge. It transforms your chats into dynamic workspaces for organized ideation, project management, and effortless information sharing, blurring the lines between communication and productivity.