I wasn't aware of the GNU Octave project until I saw a post on Reddit that it had hit version 4.0.0. If you're not familiar with it either, here's a brief overview:
GNU Octave is a high-level interpreted language, primarily intended for numerical computations. It provides capabilities for the numerical solution of linear and nonlinear problems, and for performing other numerical experiments. It also provides extensive graphics capabilities for data visualization and manipulation.
So why is this exciting? Aside from a Windows installer for all you people too lazy to switch to GNU/Linux, it apparently finally got a GUI (kind of a must for "modern" software):
Octave 4.0 is a major new release with many new features, including a graphical user interface, support for classdef object-oriented programming, better compatibility with Matlab, and many new and improved functions.
You can also get the full list of user-visible changes here.
Share and enjoy!
I've always used it spreadsheet-y style, here's a hideously complicated script that outputs a number at the end, now mess with the script until that number at the end "works" using git and what ever else to store my script. I'm not sure how that would fit in, if at all, with GUI style use. emacs is my gui, kinda.
"well i clicked the mouse 7000 times to get an almost good result and now I need to roll back to 6000 times on a different git branch" hows that work in a gui?
It is a very versatile tool, usable in many different ways.