Open building institute

https://www.openbuildinginstitute.org/about-what-we-do/

The OBI system is open source, collaborative and distributed.
Our focus is on low cost and rapidly-built structures that are modular, ecological, and energy efficient.

Wikihouse

https://wikihouse.cc/

WikiHouse is an open source project to reinvent the way we make homes. It is being developed by architects, designers, engineers, inventors, manufacturers and builders, collaborating to develop the best, simplest, most sustainable, high-performance building technologies, which anyone can use and improve. Our aim is for these technologies to become new industry standards; the bricks and mortar of the digital age.

Fractal-Emergent Settlement Architecture (FESA)

https://astroekistics.com/2017/06/30/fractal-emergent-settlement-architecture-fesa/

Fractal Emergent Settlement Architecture (FESA) is a settlement system architecture plan developed by Nicholas A. Carlough. FESA is based upon a single structural module (Cell) with nearly infinite scale-ability designed as a shell for the propagation of soil based closed socio-ecological life support system (SELSS). FESA expands along a fractal pattern using a standardized construction modules and layout, minimizing diversity of necessary manufacturing and maintenance infrastructure.