OpenMapTiles

"OpenMapTiles provides the fastest way how to setup custom styled world maps with open-source software. In a few minutes, you can have your own OpenStreetMap tileserver - ready for use in your websites or products.

The project turns the publicly available OpenStreetMap data into ready-to-use packages containing vector tiles for the whole planet, individual countries and major cities. Downloaded map tiles can be displayed on websites with JavaScript viewers, used in native mobile applications on Android and iOS (even offline), or turned into traditional raster tiles or high-resolution images for printing.

There are online guides to get started.

We have prepared a set of beautiful Open Map Styles for our vector tiles. The styles are free and open-source, and you can adapt the design and code for your project or commercial product however you like. Either use one of our map styles directly as your base map or as a starting point for your own map design. You can also use an open-source visual map style editor.

Our new Vector Tile Schema is encoding the cartography decisions made on top of OpenStreetMap, Natural Earth and other OpenData sources and is 100% open and free to use, extend or build upon. We hope people will adapt, copy and reimplement our schema and data model in their projects while providing attribution."

https://openmaptiles.org/

http://naturalearthtiles.org/