iPad Apps to Infinite hierarchical depth

Transpose was a versatile workspace designed for individuals and teams, combining elements of note-taking, project management, CRM, and data organization into a single, flexible platform. It empowered users to structure information and collaborate efficiently.

Org-mode is a powerful and flexible mode for GNU Emacs, designed for note-taking, project planning, to-do list management, and authoring documents. It utilizes simple plain text files with intuitive markup.

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.

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.