FullScreenMaps.com
FullScreenMaps is a free service to view online maps fullscreen in your browser. It's made to be simple. You can navigate the maps by clicking the name of the source map eg Bing maps or the OpenStreet map.
To find a location you type a country, city or name and click the find button. When found, the place will be centered in the map.
Icons
zoom in, get a closer look.
zoom out, get a wider look.
road view, the map shows a graphical image with roads.
aerial view, the map shows an aerial image.
hybrid view, roads are shown upon aerial image.
Direct link
If you know the longitude and latitude of a location you can make a direct link to it.
e.g. http://fullscreenmaps.com/bing?long=51.178852&lat=-1.826393&z=5
Zoomlevels depends on used map, check the zoomtable.