Engineering Commons LLC is a family-owned fabrication shop serving the Denver-Boulder area from locations in Boulder and Erie, Colorado. The company combines practical manufacturing capabilities with a strong interest in mechanics, astronomy, and horology, sharing its knowledge through educational resources, research, project documentation, and reference materials.

Its workshop specializes in custom and small-batch items, using waterjet and laser cutting, machining equipment, a foundry, and 3D printers. The listed capabilities also include casting and woodworking. Products available through its online store include a hex bit organizer and a lunar volvelle. Featured projects include the Celestis Nova coffee table orrery and work related to the Antikythera mechanism.

Engineering Commons also publishes educational material on subjects such as gear design, orreries, astrolabes, lunar months, eclipse prediction, and the equation of time. Visitors can explore build and photo galleries, manufacturing references, and project updates, including progress on the Celestis Nova orrery. The brand brings fabrication, technical exploration, and accessible learning together in one resource for curious makers and enthusiasts.