providing more precise control to analyze exactly what you need for every unique spatial network problem. The toolbox requires Rhinoceros version 5 software as of SR 10 or later. SSA Plugin – Written by Burak Beyhan at Mersin University. Space Syntax Analysis (SSA) Plugin is operational on free and open source software for GIS (FOSS4GIS) including OpenJUMP, gvSIG, OrbisGIS, QGIS, OpenEV, Thuban, MapWindow GIS, SAGA, and R Project. SSA Plugin calculates the standard space syntax measures including connectivity, total depth, mean depth, global integration, local depth, local integration and control values for each feature involved in a spatial configuration, and intelligibility value for the whole of the configuration. Users can export an adjusted graph to an external file in a Social Network Analysis (SNA) file format for further analysis of the spatial configuration concerned in the respective software environment. depthmapX – Developed by the depthmapX development team. It is an open source multi-platform spatial network analyses package based on the original Depthmap. It can generate isovists and perform visibility graph analysis of building systems on computers running Mac OS X, Windows and Linux, it includes automatic generation of axial line networks and analysis of axial line networks and road segment line networks. depthmapX is based on Qt framework. Spatial Design Network Analysis (sDNA 3D) – Since 2011, it has been developed by Alain Chiaradia, Crispin Coop[er and Chris Webster at Cardiff University and University of Hong Kong. It is a free tool that unifies the use of spatial network analysis in design and research. Plugins are provided for Autocad (for designers), ArcGIS, open source QGIS (for analysts & designers) and as a standalone Python version that works on 2D or 3D shapefiles enabling use in other GIS software and custom projects. sDNA standardizes on the network link as a unit of analysis, and computes a wide variety of closeness, betweenness, severance and efficiency measures. sDNA works with 3D topography and 3D multilevel environment. Analyses and Radius can use Euclidean, angular, topological or custom distance metrics, and link, length or custom weightings. In Angular analysis mode sDNA computes cumulative angular change along the link and angular change at junction resulting in angular geodesic. CASOS ORA – Developed by Dr. Kathleen M. Carley and the joint Carnegie Mellon University and Netanomics team. It is tools that support social and spatial network analysis. It is interoperable with other spatial analysis tools such as