I am using Google maps for my map tiles. These tiles are very road oriented. As i am making an application for waterways i would like to change my map so that its main focus is on waterways.
I have a little bit experience with making custom map tiles with Mapnik, but it still requires me to make a lot of styling decisions and styling is not my strongest point. So it would be great if there are some free stylings available that let me render map tiles with a focus on waterways, like the ANWB (Dutch) water map.
I have found a site where i could change and test styles on the fly, but they had to serve the tiles and i think it also cost money to use their service. I am able to host such a tile service myself once i have the correct tiles.