I feel the map style I’ve been working on recently is in good enough shape to announce. It is written in carto and designed to be used with OpenStreetMap data. It is an overlay layer for aerial imagery, though in my example I use NearMap imagery.
Take a look at http://tianjara.net/osmt.html.
The source is at https://github.com/andrewharvey/osm-hybrid-carto/, licensed CC-BY-SA.
There is still lots of work to do on it though.