Orchis is a Material Design theme for GNOME/GTK based desktop environments.

A flat colorful Design icon theme

A colorful design icon theme for linux desktops

Mojave is a macos Mojave like theme for GTK 3, GTK 2 and Gnome-Shell

MacOSX Mojave like theme for KDE Plasma

Modern Design theme for Grub2

ChromeOS theme for kde plasma

ChromeOS gtk theme for linux desktop

McMojave-circle icon theme for linux desktops

Qogir is a flat Design theme for GTK

Qogir theme for kde plasma desktop

Tela-circle-icon-theme

Vimix is a flat Material Design theme for GTK 3, GTK 2 and Gnome-Shell etc.

MacOS big sur theme for kde plasma