Powered by GeoIQ, Geo Commons is an interactive website, open to the public, that is sponsored by many different companies, international NGO’s and news sources. Geo Commons offers extensive maps and data with an application to create your own maps directly on the website. This feature requires a free user identification, with which you can save maps, upload your own data to their database and create and belong to groups to share files and collaborate on maps. In a sense, this is a community for building maps and sharing resources. Geo Commons also offers free resources for API Developers. Access to this website seems like a must for any professionals utilizing GIS, and especially for students learning about these tools.