Free GIS application

MapWindow GIS Application

http://www.mapwindow.org/download.php?show_details=1

Description:

MapWindow GIS desktop application is a free, open source, standards-based standalone software package that you can use to view and edit GIS data in many file formats.

The software includes plug-ins for various geoprocessing tasks (e.g. buffer, merge, etc.), watershed delineation, accessing online data sources, and an experimental geodatabase plug-in. The attribute table editor can be used to write simple queries, and there is a complete scripting editor that allows you to write and run scripts in VB.NET and C# directly in the MapWindow program.

Download MapWindow GIS if you need a simple map viewer, or if you want to write your own custom plug-ins to distribute to other users.

The installer includes sample data and is compatible with Windows 98 and up. Source code can be downloaded using SVN code repository.

My Comment:

I really like those plug-in tools.
For example, the coordination system converter is really convenient!
From that GIS Tools menu, select Vector => Reproject a Shapefile.