Catholic Open Source (aka Catholic OS) is an initiative that brings together Catholic developers, educators, and advocates to build free and open-source technologies in service to the Church's mission of evangelization.

The Catholic Digital Commons Foundation (CDCF), incorporated on January 21, 2026 in the State of Texas, coordinates community efforts for the common good and contributes to a shared digital patrimony for the Catholic Church, in partnership with other Catholic organizations while also maintaining a close collaboration with the Church hierarchy.

This GitHub organization serves as a collaborative space where contributors can share ideas, develop projects, and explore how technology can best support the Church's evangelizing mission. As part of this effort, Catholic Open Source Hackathons (COSH) — a series of virtual and in-person events — are conducted to activate and unite contributors in hands-on collaboration, serving as a cornerstone format to animate the broader Catholic OS initiative. The GitHub organization is a place where participants can share their work and collaborate with others, and where hackathon projects can be hosted.