QGIS
How to export from qgis to webmap and from webmap to qgis layers #QGIS
http://www.christinafriedle.com/interactive-map-blog/open-source-interactive-mapping-a-rudimentary-introduction-to-the-qgis2web-plugin-for-quantum-gis https://github.com/tomchadwin/qgis2web https://github.com/tomchadwin/web2qgis