Wallapatta

Although it might pass by as just your average, no-frills Markdown editor (since it borrows much of the syntax), Wallapatta is actually an interesting piece of software designed to offer you a smooth way of creating print-affable documents that might also require the usage of sidenotes.

Hassle-free installation and Markdown editor-inspired interface

Deploying this application on your computer is reduced to a simple double click on its streamlined installer that takes care of the whole process without any further intervention on your part.
Once launched, you are bound to discover the app's the main window's layout with a live preview feature, another component borrowed from typical Markdown editors. The interface itself is highly-intuitive, and it instantly becomes clear that this app was designed to be as less-distracting as possible.

Forthright editor that makes it easy for you to create print-ready documents

Regardless of your experience with similar apps, you should be able to find your way pretty quick around this app, since all of its main features can be conveniently reached from the top toolbar.
Consequently, the workflow is as straightforward as it can be. Simply write or import your texts, add sidenotes, edit them using the typical Markdown syntax or make use of the quick controls from the aforementioned toolbar and view the changes in the live-preview section.

Meticulous users will surely appreciate 'smart page break' feature

This said, you should also know that this unusual yet useful utility comes with support for HTML, JavaScript, and Coffeescript.
Once you get to the actual printing part of the documents, you might be able to appreciate another neat trick that Wallapatta has up its sleeve, namely its focus on finding the perfect location for adding page breaks.

Intuitive editor with a strong focus on making your documents print-friendly

Thanks to its uncommon or different set of features, Wallapatta is a very interesting application that is recommended for users that want to edit and print documents with clean and methodical layouts, as portrayed by Edward R. Tufte in his many books.