Open design communities allow for collaboration on design projects. Open source software is developed collaboratively without hierarchy, based on reputation. Examples of open design include OpenMoko, an open source mobile phone, and RepRap 3D printers that can be built at home. As tools like 3D printing and laser cutting become more accessible, distributed manufacturing is growing through open design communities and platforms. For open design to reach its full potential, new collaborative tools, processes, and financial models are needed to better support designers, makers, and users.