Rimu Schematic 

Rimu Schematic is professional quality electronic schematic capture software, designed for ease of use. Exports: Spice deck, Abel HDL, CUPL HDL, PCB netlist - four formats, and Bill of Materials. Features: DRC, hierarchical design.
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TextIndexer 

TextIndexer is a PIM, Text Editor and Internet Search Utility. TextIndexer uses an intuitive tree interface to allow hierarchical storage of information (text, picture items and other objects).
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InfoPro 

InfoPro manages your bits and pieces of information without having to manage multiple files. It can handle anything from a to-do list to complex notes. You can collect all your bits and pieces of information into a "hierarchical collection of notes".
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File Rules 

File Rules just uses keywords to organize and store any kind of files and documents. Is a new kind of file manager that totally replaces traditional hierarchical tree structures normally used to organize and categorize files.
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Cute Organizer 

Fast, convenient and nice looking information management system, featuring hierarchical textual and visual data representation regarding your contacts, tasks and notes.
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Agenda At Once 

Simple and useful to-do list, scheduler and notes management. Features: multiple databases, password protection, hierarchical to-do list, percent based task completion, drag&drop support, quick notes, printing, low memory and disk requirements.
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