smatDnepr

2gis:
L.tileLayer('http://tile2.maps.2gis.com/tiles?x={x}&y={y}&z={z}').addTo(map);

Google Map Streets:
L.tileLayer('http://{s}.google.com/vt/lyrs=m&x={x}&y={y}&z={z}', {subdomains:['mt0','mt1','mt2','mt3']}).addTo(map);

Google Map Terrain:
L.tileLayer('http://{s}.google.com/vt/lyrs=p&x={x}&y={y}&z={z}', {subdomains:['mt0','mt1','mt2','mt3']}).addTo(map);

Google Map Hybrid:
L.tileLayer('http://{s}.google.com/vt/lyrs=s,h&x={x}&y={y}&z={z}', {subdomains:['mt0','mt1','mt2','mt3']}).addTo(map);

Google Map Satellite:
L.tileLayer('http://{s}.google.com/vt/lyrs=s&x={x}&y={y}&z={z}', {subdomains:['mt0','mt1','mt2','mt3']}).addTo(map);