QGIS is a free, open source, cross platform (lin/win/mac) geographical information system (GIS)
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Wind Data Logging software for Anemometers designed to provide an accurate and affordable plug-&-play solution for wind site evaluation and wind generator performance. Compatible with Atmo Anemometer Wind Sensors and Atmo Wind Data Logger. Features live anemometer wind data plotting, wind speed database, automatic Weibull analysis and live WEB streaming of anemometer data. Atmo v2.0 will be available for download on http://wind101.net
HMI and SCADA
LibreCAD is a 2D CAD drawing tool based on the community edition of QCad (www.qcad.org). LibreCAD has been re-structured and ported to qt4 and works natively cross platform between OSX, Windows and Linux.