QGIS Plugin for multi-distance / multi-ring / multi-zone buffering.
The plugin uses QgsGeometry.buffer, QgsGeometry.combine and QgsGeometry.symDifference to create multi-zone buffers from a given set of buffer distances.
The plugin is available from the QGIS official plugin repository (http://plugins.qgis.org).
Master contains code for QGIS version 3.
Branch qgis2 contains code for QGIS version 2.