All I need is image cropping, therefore I implemented just this feature. Please tell me if you need more features, I will be able to develop them in the short time.
 
In order to crop an image you need to open image note, then double-click on the image, or click on the "Crop" button.
 
crop-image-page.png
 
If you aren't happy with the result, you can undo the last step using undo menu:
note-menu-undo.png