Framework for Web Mapping Apps
"Modern webmapping with OpenLayers, Leaflet and React.
MapStore is a modular open-source WebGIS framework developed to create, manage and securely share maps and mashups. This framework is able to mix map contents provided by Google Maps, OpenStreetMap, Bing or other servers compliant to OGC standards like WFS, CSW, WMC, WMS, WMTS and TMS.
MapStore is used to find, view and query published geospatial data and to integrate multiple remote sources into a single map."