Faunalia - Group of professionals specializing in free and open source software for geographic information systems, environmental analysis and management. Blue Marble Geographics - Offer freeware program for viewing DGN, DWG, DXF, TAB, and MIF files. Project GeoSim - Geography Education Software. - Software for introductory geography courses. Modules include human population, migration modeling, and quizzes. Terra Viva - Digital products for education, understanding, and promotion of earth sciences, global change, and worldwide geopolitical issues WinGlobe - A simple interactive globe for the desktop that can tell you what time it is in cities around the world. Real World Interface - A project within Lysator, attempting to present geography-oriented information using computers. ZipMath - A software package that performs distance calculations based on zipcodes. CoversUnited States and Canada locations. Runs on a web server or local Windows platform. Software and Commercial Vendors - Resources from the University of Colorado's Department of Geography. Click and Learn Geography Software - Download free demo. Quickly learn all 50 states or all Presidents, teaching tool for home or school.