Scientific Use Of Linux

Been watching this clip <https://www.youtube.com/watch?v=bP6aVvunbfU> and
noticed, at 8:01, a screenshot of an interesting computer desktop.

First of all, note the “K” symbol for the application menu at the bottom
left: that’s a KDE Plasma desktop, probably from a few years ago. A little
to the right of that, in the taskbar, is an array of 2 rows of 3
rectangles, denoting that the user has 6 virtual desktops configured (the
default 4 obviously not being enough).

The top left is a Jupyter notebook window, with some lines of Python code
(and output therefrom) in it. The big window at the right might be a text
editor; can anybody identify it more precisely? And also the image viewer
below the notebook window?

Clip with direct link to time offset, in case it works for you:
<https://www.youtube.com/watch?v=bP6aVvunbfU?t=481>