Spatial network analysis software packages are analytic software used to prepare graph-based analysis of spatial networks. They stem from research fields in transportation, architecture, and urban planning. The earliest examples of such software include the work of Garrison (1962), Kansky (1963), Levin (1964), Harary (1969), Rittel (1967), Tabor (1970) and others in the 1960s and 70s. Specific packages address to suit their domain-specific needs, including TransCAD for transportation, GIS for planning and geography, and Axman for Space syntax researchers. Packages Many packages are available. Many were developed in academia and are freely available or freely available for academic research. In historical order: Axman – The (near) original developed by Nick Sheep Dalton of UCL to perform axial line analysis on computers running Mac OS, currently used in more than 50 countries. This spawned offshoots such as Pesh (for the analysis of convex space networks) and SpaceBox (for the analysis of 'all-line' axial maps). Spatialist – Developed at Georgia Institute of Technology to implement theoretical innovations principally introduced by John Peponis. This software plugs into the MicroStation CAD package to analyse networks of automatically generated 'e-spaces' and 's-spaces'. Axwoman 1 – Written by Bin Jiang while at UCL. It is a tool to perform axial analysis as a plug-in to ESRI products. Axwoman 6.2+ – Evolved from Axwoman 1.0 and research by Bin Jiang and his team. Axwoman 6.2 is a free plug-in to ArcMap 10, combined with AxialGen in one installer. Featured functionality includes automatically generating natural streets and axial lines from OpenStreetMap data. The website also contains tutorials. Depthmap – Developed by Alasdair Turner of UCL. This software initially generated isovists and performed visibility graph analysis of building systems on computers running Windows. It evolved to include automatic generation of axial line networks and analysis of axial line networks and road segment line networks at anything up to the level of the US or Europe. OmniVista – Developed by Nick Sheep Dalton and Ruth Conroy Dalton. It performs a range of isovist measures on Mac OS computers. Fathom – Commercial implementation of visibility graph analysis written by Intelligent Space Partnership. Mindwalk – Developed by Lucas Figueiredo, This software performs spatial analysis over standard axial maps and new continuity maps. It is written in Java and runs on several platforms. It is also known as xSpace. Mindwalk has been used as a research and teaching tool since 2002. It is