KeepNote is a note taking application.
With KeepNote, you can store your class notes, TODO lists, research notes, 
journal entries, paper outlines, etc in a simple notebook hierarchy 
with rich-text formatting, images, and more. Using full-text search, 
you can retrieve any note for later reference.

KeepNote is implemented in Python and PyGTK

To use spell checking (optional) you will need:
    python-gnome2-extras