Apps with 'Tree structure' feature
A hierarchical note taking application, featuring rich text and syntax highlighting, storing data in a single xml or sqlite file.
List-making software with infinite levels of indentation, giving you the flexibility of infinite layers of organization.
Open-source tool for writers. With outliner, character management, plot development, distraction-free editor, etc.
wikidPad is a Wiki-like notebook for storing your thoughts, ideas, todo lists, contacts, or anything else you can think of to write down.
Windows desktop application to stay on top of your daily tasks.
ACDSee is a complex, multi-purpose application that serves for viewing, organizing and editing digital photos.
Next Generation Session, Windows, Tabs Manager and a TooManyTabs Solution That Really Works.
KeyNote NF is a flexible, multi-featured tabbed notebook, based on Windows standard RichEdit control.
A new medium for your ideas—augment your thinking with a text editor designed for structuring lists. Side-by-side views allow 3 modes of thinking.
SynWrite is a free source code editor and notepad replacement for Microsoft Windows Operating Systems.
A dockable sidebar for Chrome featuring vertical Tree Style Tabs, Tab Hibernation, and much more.
Multi-document markdown-like editor for writing novels.
The NERD tree allows you to explore your filesystem and to open files and directories.
Can create awesome 3d tree models and export to obj file format. Good thing is the software is free of any charge.
MyInfo is a personal information manager for Windows. It will help you capture, organize, edit and share ideas, documents, tasks, and web pages.