GNU Octave

It matlab alternative. it has good and stable development.
It free and open source.
https://www.gnu.org/software/octave/about.html
Also Has gui.
Need to open with octave --force-gui (The gui also work on windows. I tested on windows 10 and it work!)
https://codeyarns.com/2014/06/25/how-to-use-octave-with-gui/.

Also have robotic toolbox and ros connection (this is what i like).
Robotics:
https://wiki.octave.org/Robotics_package

Ros:
http://wiki.ros.org/rosoct

Please make it portable apps software.

Thanks,
Tal.