OpenConstructionERP

Open-source construction ERP - BOQ, PDF/CAD/BIM takeoff, AI cost matching. 42 regional catalogues, 21 languages, 71 modules. AGPL-3.0. v3.0 - pip install openconstructionerp. Maintained by datadrivenconstruction on GitHub, where it has earned 628 stars from the community.

It's actively developed around 4d, 5d, ai, and is a solid reference for anyone building with these tools.