Pencil is awesome. It is my goto prototyping and wireframing tool. I honestly like it better than the other tools with price tags that I've used out there. Some

Pencil is awesome. It is my goto prototyping and wireframing tool. I honestly like it better than the other tools with price tags that I've used out there. Somehow it seems noone knows about this, but its doing for mockups/wireframing what Blender does for 3D artists - providing a high quality open source tool that is usable by industry professionals. I hope pencil and their devs get more recognition / funding.