BlockLayer Graph Paper - BlockLayer provides you with an online Printable Graph Paper with customizable properties and patterns to choose from, including Lines, Dots, and Isometric.
NotePlan - Make plans inside an individual markdown note for every day in your calendar. Use it as a journal for your daily tasks and plan todos in advance. For Mac, iPhone and iPad.
Printable Graph Paper - Printable Graph Paper from Kent State University is a valuable resource that you can download in PDF format and use wherever necessary.
Markdown to PDF - Super simple way to get your markdown files to PDF
UnMarkDocs - Unleash the Power of Markdown to Write Better Product Documentation
Gridzzly - Print your own grid paper