https://phet.colorado.edu/en/simphet.colorado.edu/en/simulation/glaciersulation/glaciers
http://www.glaciers.pdx.edu/Projects/LearnAboutGlaciers/GlacierModels/GlacSimS.html
https://vesl.jpl.nasa.gov/
http://www.glaciers.pdx.edu/Projects/LearnAboutGlaciers/GlacierModels/GlacSimS.html
https://vesl.jpl.nasa.gov/