Easy parallelogram drawing for Newtonian mechanics. This page here: http://www.ballooncalculus.org/mechanics For encouraging similar diagrams freehand or with a set-square. For helping get beyond vertical and horizontal decomposition… e.g. for parallel or perpendicular to an inclined plane. Interactive but all in the browser - no uploading or downloading but you can load and save work. Thanks for looking. Feedback welcome.