The source code and editorial summaries use Apache 2.0. Preserve the NOTICE and third-party notices when redistributing. Linked projects retain their own licenses.
The license does not grant trademark rights or imply endorsement. Stack Menu, Kogen and Optimum names, marks and website artwork identify their respective products and owner; independent forks should identify themselves clearly. The current typographic icon and share card are provisional. See the artwork map for editable sources and font licenses.