Penbook (Windows 10/Surface Digital App) FREE (orig. $19.99) @ Microsoft - exp 07/03
Enables freehand writing experience on Windows 10.
Windows App Creator of the Year Finalist
Take notes, plan your day (or year), draw a sketch, or do your math homework. Penbook includes dozens of kinds of stationery, from graph paper to sheet music. You can even import your own photos or PDFs to write on.
Keep your work organized with beautiful, customizable notebook covers. Create in portrait or landscape mode, and share and export your work with just a few taps.
Penbook was built for pens (but you can use your finger or a mouse, if you want), and includes support for Surface Dial.