AtoZ Maps Online, contains over 60,000 political, physical, and thematic maps. Created by World Trade Press, this database offers NASA maps, volcano and earthquake maps, as well as environmental, climate change, and geology maps. There are also interactive map games and crosswords, with a printable name/score page, country and state flags, and links to free GIS software . All maps are royalty-free, meaning you can make posters, download maps, create multi-media presentations, or any other educational purpose, without worrying about copyright infringement.