THEME BUILDER
Oomox
Version: 1.13.3 Web: https://github.com/themix-project/oomox/releases
Since theme engine support was removed from GTK 3.18 a few years ago, the way your desktop looks now depends on CSS styles. This applies to Gnome, Cinnamon, Pantheon and other desktop environments that are based on GTK3. Although it may seem that there are still plenty of themes to choose from, most of them are forks of just a few original style sheets, such as Numix, Materia and Arc. Naturally, many users are keen to create their own theme flavours, fix colours to their tastes, complement a GTK style with icons and so on.