Gwennel

Gwennel is a text editor that lets you work in two radically different ways:

On the one hand you have the classic WYSIWYG (what you see is what you get), where you can work on your document and see at all times how it would look if you were to print it.

On the other hand there's the less widespread WYSIWYM (what you see is what you mean), which is a bit more abstract and has you working on the structure of the text even before writing the text itself.

Gwennel also lets you create all kinds of tables, import images (by dragging and dropping), and upload documents in ODT format.