for an alternative, free (libre) school program like itp, probably not under the pressures of the market and capitalism (?) we would use...
free GNU/Linux as an operating system.
Replicant as a mobile operating system.
inkscape for vector-based drawings.
gimp for gui-based bitmap edition and creation; imagemagick for command-line-based image manipulation.
kdenlive or pitivi (or others) for video edition.
blender for animation
Godot as a game engine.
audacity for audio recording and edition
openSCAD for parametric solid 3D CAD modelling