Wikimedia Foundation has implemented a new vector tile service Kartotherian (Mapbox+Mapnik stack) and launched an experimental tile and static maps service available at https://maps.wikimedia.org. Using this service, you can browse and embed map tiles into your own tools using OpenStreetMap data. Currently, we handle traffic from *.wmflabs.org and *.wikivoyage.org (referrer header must be either missing or set to these values) but we hope to open it up to Wikipedia traffic if we see enough use. 

Getting started is as easy as https://www.mediawiki.org/wiki/Maps#Getting_Started

Tiles are served from https://maps.wikimedia.org, but can only be accessed from *.wmflabs.org and *.wikivoyage.org.  Kartotherian can produce tiles as images (png), and as raw vector data (pbf Mapbox format or json):
  https://maps.wikimedia.org/{source}/{zoom}/{x}/{y}[@{scale}x].{format}

Additionally, Kartotherian can produce snapshot (static) images of any location, scaling, and zoom level with
  https://maps.wikimedia.org/img/{source},{zoom},{lat},{lon},{width}x{height}[@{scale}x].{format}
For example, to get an image centred at 42,-3.14, at zoom level 4, size 800x600, use https://maps.wikimedia.org/img/osm-intl,4,42,-3.14,800x600.png  (copy/paste the link, or else it might not work due to referrer restriction).

Editing map style is very easy using the Mapbox Studio, and does not require any data on your machine - simply point it at Wikimedia server.

How can you help?

* Provide us feedback to help guide future features

* Improve our map styles

* Improve our data extraction

* File bugs in Phabricator

* Adapt your labs tool to use this service - for example, use Leaflet js library and point it to https://maps.wikimedia.org

Based on usage and your feedback, the Discovery team will decide how to proceed. We could add more data sources (both vector and raster), work on additional services such as static maps or geosearch, work on supporting all languages, switch to client-side WebGL rendering, etc. Please help us decide what is most important.

https://www.mediawiki.org/wiki/Maps has more about the project and related Maps work.

We would like to thank WMF Ops (especially Alex Kosiaris, Brandon Black, and Jaime Crespo), services team, OSM community and engineers, and the Mapnik and Mapbox teams. The project would not have completed so fast without you.