https://github.com/simonepri/geo-maps
https://catalog.data.gov/dataset/blm-ak-native-allotment-selection
https://catalog.data.gov/dataset/tribal-lands-ceded-to-the-united-states-feature-layer-cf3ca

Best Free Geospatial Tools

https://www.statsilk.com/software/add-on-modules

AnyChart seems to be an interesting option if I wanted to use it for keyboard layouts.
https://docs.anychart.com/Maps/Custom_SVG_Maps

http://132.72.155.230:3838/js/geojson-1.html

https://leafletjs.com/examples/geojson/
https://github.com/altrdev/hugo-leaflet
https://github.com/simonfrey/hugo-leaflet
https://discourse.gohugo.io/t/add-leaflet-js-map-to-markdown-post/24716

Administrative areas

Global Administrative Areas 2015 (v2.8) dataset. Hijmans, R. and University of California, Berkeley, Museum of Vertebrate Zoology. (2015). Second-level Administrative Divisions, United States, 2015. UC Berkeley, Museum of Vertebrate Zoology. Available at: http://purl.stanford.edu/gv775hx4053
- this resource has a dubious license.

https://www.census.gov/geographies/mapping-files/time-series/geo/carto-boundary-file.html
https://github.com/aourednik/historical-basemaps
https://data.humdata.org/dataset?q=Thailand+-+Admin+Level+2+Boundaries&page=1
https://data.humdata.org/dataset/kenya-admin-level-2-boundaries-0

Explination of admin layers
https://sedac.ciesin.columbia.edu/povmap/ds_defs_admin.jsp

https://gis.stackexchange.com/questions/18249/source-for-geojson-data-for-the-us

Simone Primarosa - simonepri. 2023. Geo-Maps. https://github.com/simonepri/geo-maps

Front runner: https://www.geoboundaries.org/

https://github.com/geonetwork/core-geonetwork
https://geonetwork-opensource.org/

https://public.opendatasoft.com/explore/dataset/world-administrative-boundaries/export/
https://datahub.io/core/geo-countries