MapStore is an open source application created by GeoSolutions to allow users to create, save, and share maps and mashups. It provides tools for map creation, browsing existing maps, and sharing maps. MapStore has a modular architecture built on open source standards and libraries. It includes components for map management, composition, viewing, and interacting with metadata catalogs. GeoSolutions provides commercial support and consulting for MapStore and other open source geospatial projects like GeoServer and GeoNetwork.