NoteBook.app is an application to store and organize your notes written
for use with GNUstep.

Features
 * Uses a document interface to open multiple Notebooks.
 * Each notebook has it's own tree interface navigable via a NSBrowser
   control. Both branch pages and leaf pages can contain note information.
 * Stores note pages in Rich Text Format allowing you to format the note
   with different fonts, styles, weights, etc...

WWW: http://notebook.cowgar.com/