Just thought I'd share some map-making web services that I rely on regularly.
STAMEN
This site is amazing. Play with the different modes (streets, labels/no labels, terrain etc). Also the projects have some interesting modes (sea level rise...). This has been my go-to map source for a few years.
Stamen Maps/Design
OPEN STREET MAP VERSIONS
OSM makes map data available for other apps. At the bottom is the list of apps out there but here are some excellent ones...
Europe Beta
Unbelievable Europe Map that looks like paper but zooms in for building detail. In addition, if you run the mouse over the screen it identifies the Terrain/Land type. Really cool. Especially for T2k.
Europe Beta Map
Detailed Topo Maps of Europe
Topographical Maps of Europe
Isometric Map of Czech (10 stars!)
Complete with buildings and all.
Czech 3D
Isometric Maps of Europe/World(10 stars!)
>Slowly expanding, covers a good chunk of western europe at this point. Some eastern points.
WorldIsoMaps
Here is the list of all OSM apps, I have NOT looked at all of them.
List of OSM based services
Awhile back I found another crowd-sourced map app that identified specific buildings at a local level in Europe. Still looking for it since I can't find it now... I'll let you know when I do.