Scilab is a numerical computation package, as good (or better) than Matlab. Scilab is free and open source: runs on GNU-Linux, Windows and Mac. In fact, thanks to the FOSSEE project, one can execute Scilab scripts on a browser too! Visit the Scilab-on-cloud website to try this out.
A large amount of learning resources can be found on the internet. Spoken tutorials on Scilab (dubbed in many languages) can be found at http://www.spoken-tutorial.org
Files relevant to the TEQIP-NCM-NBHM workshop of November 2019 held at IIT Bombay can be found by clicking here.
-Madhu, 14th Nov 2019