coss

coss.com/ui is the official design system of Cal.com, providing a cohesive set of reusable components, guidelines, and tools for building consistent user interfaces. It is designed for developers and designers working on Cal.com or related scheduling applications, streamlining collaboration and accelerating product development. The project is interesting because it demonstrates how an open-source company standardizes its visual language at scale, offering a practical, real-world example of a design system tailored for a complex, multi-platform scheduling ecosystem.