MapWindow GIS is a free desktop geographic information system (GIS) application with an extensible plug-in architecture. It also includes a GIS ActiveX control and a fully C# GIS application programmer’s interface (API) called DotSpatial that can be used by software developers. MapWindow can be used as an open-source alternative to many commercial desktop GIS software packages, it can be used to distribute data to others who may not have a GIS, and it can be used to develop and distribute custom geospatial data analysis tools, or plug-ins.
MapWindow includes standard GIS data visualization features as well as DBF attribute table editing, shapefile editing, and data converters. Many standard GIS data formats are supported including shapefiles, GeoTIFF, and ESRI ASCII and ArcGrid formats.
MapWindow is free to use and redistribute to others. The source code is also available, and MapWindow can be modified to fit user needs. It can also be embedded in other software programs.
Additional data analysis and visualization plug-ins for MapWindow are available via the MapWindow website http://www.mapwindow.org.
Source code for MapWindow can be accessed via the MapWindow website.