Aerospace was the earliest adopter of standard CAD data formats (ISO 10303 [1]) and the current development is mainly funded by Boeing and Airbus. You could bui

Aerospace was the earliest adopter of standard CAD data formats (ISO 10303 [1]) and the current development is mainly funded by Boeing and Airbus. You could build something on top of Open Cascade Technology [2] if you want an open source solution, BRL-CAD supports STEP too. [1] https://en.wikipedia.org/wiki/ISO_10303 https://en.wikipedia.org/wiki/ISO_10303 [2] https://en.wikipedia.org/wiki/Open_Cascade_Technology https://en.wikipedia.org/wiki/Open_Cascade_Technology