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Ladybug Tools is a collection of free computer applications that support environmental design and education connecting 3D Computer-Aided Design (CAD) interfaces to a host of validated simulation engines. Although Ladybug Tools do ship platform agnostic libraries, it is currently primarily only usable with proprietary tools, and therefore placed within this category.
The Ladybug tools provide a "web of interoperability" with many tool, including libre software packages:
The Ladybug tools also provide interoperability with proprietary software such as: