It matlab alternative. it has good and stable development.
It free and open source.
Also Has gui.
Need to open with octave --force-gui (The gui also work on windows. I tested on windows 10 and it work!)
Also have robotic toolbox and ros connection (this is what i like).
Please make it portable apps software.
I have already made one for testing. Please have a look at https://portableapps.com/node/58663
You will have to manually install other software packages not included in the default installation.