Google Maps

You can create as many Google maps as you want, add as many marker as want to them.

You can find different styles on Snazzy Maps https://snazzymaps.com/ you can use the for free if they are licensed under creative commons.

Roadmap - Classic Google map style

Terrain - Blue Essence style - No map controls

Roadmap - Subtle Grayscale style - Zoom disabled when mouse whell scroll

Hybird - New York

Satellite - No markers - Level 12