MeteoInfo is a freely available software designed to view and analyze meteorological and spatial data interactively. Some GIS functions were developed from ground level. It has two editions: Java and C#. MeteoInfo may be run in Windows, Mac OS, Linux and Unix. MeteoInfo can also be run automatically using MeteoInfo scripting with the IronPython language (C# edition) or Jython language (Java edition). The main functions are packed in the MeteoInfo class library, which could be used to conveniently develop the software.