M3-CRETE
Experimental open-hardware reference design for research and development.
View the projectExperimental additive-construction projects and early-stage materials decision support
Sunnyday Technologies
Tools and reference projects. Open foundations.
Sunnyday Technologies LLC publishes experimental open hardware, a maintainer-authored public data schema, CAD validation tools, and early-stage materials decision support.
Current public work
These projects are designed to help technical teams organize evidence and plan controlled validation; they are not certifications, project specifications, production systems, or substitutes for qualified professional judgment.
Experimental open-hardware reference design for research and development.
View the projectMaintainer-authored schema and documentation, not a supplied dataset or ratified standard.
View the schemaEarly-stage evidence-readiness and materials decision support; public self-service purchase and prediction routes are not open.
View current statusOpen-source CAD assembly validation framework.
View the projectJanuary–August 2026
Seven connected engineering toolsets. Sixteen technical articles and working papers. Explore the open repositories and the thinking behind them.
A human-reviewed technical inquiry may be requested. An inquiry is not an accepted order. Any paid work requires a written scope, price, rights and data-handling terms, safety boundary, tax treatment, reviewer role, fulfillment plan, refund terms, and payment instructions.