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 was developed with C# in the Microsoft .Net environment. MeteoInfo may be run in Windows with .NetFramework 3.5, or in UNIX like systems with Mono, an open source implementation of the .NET Framework. MeteoInfo can also be run automatically using MeteoInfo scripting with the IronPython language. The main functions are packed in the MeteoInfo class library, which could be used to conveniently develop the software.