WaspPad is like a tree control you can edit. As you indent paragraphs they become the children of the paragraph above them and can be collapsed or expanded. Pictures, web links, check boxes and clipboard snippets can be imbedded.
Most of the notes we make are hierarchical. That is, we make a main note then some lesser notes which relate to it. Often we then want to review just the main notes without the clutter of the minor points. Wasp pad achieves this goal by dynamically structuring the text that you type into a tree of paragraphs based on their indents which can then be minimized and maximized to produce the display you want.