IEDRO’s Director of Scientific Applications , Teddy Allen, has compiled these free online tools for data analysis and visualization
Resources
The IRI Climate Library
http://iridl.ldeo.columbia.edu/
NASA Giovanni
http://disc.sci.gsfc.nasa.gov/giovanni/overview/index.html
NOAA PSD Interactive Plotting and Analysis
http://www.esrl.noaa.gov/psd/cgi-bin/data/getpage.pl
Dutch KNMI Climate Explorer
http://climexp.knmi.nl/start.cgi?id=someone@somewhere
Free data analysis and visualization software
Gridded Analysis and Display System (GrADS)
http://iges.org/grads/
Integrated Data Viewer
http://www.unidata.ucar.edu/software/idv/
NASA Panoply
http://www.giss.nasa.gov/tools/panoply/