GIMP-2-10-Themes

Themes for The GNU Image Manipulation Program 2.10

How to install:
Launch GIMP and go to Edit > Preferences > Folders > Themes and see where it looks for the themes, put the custom theme in that folder.
Alternatively, click the button "Add a new folder" and give it a new path to search for the custom theme(s). (needs restart)

Blender

Download through download-directory.github.io: here