Google Maps offers satellite imagery, street maps, 360° panoramic views of streets, real-time traffic conditions, and route planning for traveling by foot, car, bicycle, or public transportation.
MapQuest is a free online web mapping service that can be used for locating U.S. addresses, viewing detailed maps, and finding how-to-get-there routes.
The National Map is a suite of products and services that provide access to base geospatial information to describe the landscape of the United States and its territories.
This site contains 700 world maps with associated data sets. Land areas are resized to illustrate data sets including resources, transportation, education, internet usage, etc.