The Pencil Project’s unique mission is to build a free and opensource tool for making diagrams and GUI prototyping that everyone can use. via Home – Pencil Project. Share this:Click to share on Pocket (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window) Technologies firefox floss gui mozilla prototyping ux November 12, 2010 Published by Avdi Grimm Posts by Avdi Grimm Visit Website