Open data websites are becoming an increasingly popular way to provide data to the public, by governments and international agencies alike. While not all open data repositories have geospatial components, open data repositories are a good place to start to look for data.
MADGIC, located on the first floor of the MacOdrum Library at Carleton University, has created these help guides to assist in the navigation of open data.
(Source: MADGIC Staff)
ViziCities is an open source 3D map and data visualization platform. It is built upon OpenStreetMap mapping data using WebGL and Three.js. The demo map is a 3D building map of the World.
(Source: Google Maps Mania)
Google Earth Pro is now free.
From the article by Google Lat Long:
Over the last 10 years, businesses, scientists and hobbyists from all over the world have been using Google Earth Pro for everything from planning hikes to placing solar panels on rooftops. Google Earth Pro has all the easy-to-use features and detailed imagery of Google Earth, along with advanced tools that help you measure 3D buildings, print high-resolution images for presentations or reports, and record HD movies of your virtual flights around the world.
(Source: The Map Room)