A beautiful theme that comes with many variations of accent colors and light/dark modes.
Gruvbox თემა
Gruvbox Material theme for GTK, Gnome, Cinnamon, XFCE, Unity and Plank.
ევერფორესტის თემა
The idea was born from the need for GTK themes that match the most prominent colour palettes of Neovim code editor and Tiling Window Manager, such as Xmonad, Awesome, DWM, etc, which use these colour schemes to give a uniform and unique look to working environments.
ორქისის თემა
Orchis is a flat style gtk theme for Gnome/Gtk desktop.
პოპ თემა
A GTK+ theme for Pop!_OS
Skeuos თემა
Dark/Light theme with multiple accent colors.
ლაიანის თემა
Layan is a flat Material Design theme for GTK 3, GTK 2 and Gnome-Shell which supports GTK 3 and GTK 2 based desktop environments like Gnome, Budgie, etc.
ტკბილი თემა
A sweet theme for TROMjaro 
ნორდიული თემა
Nordic is a Gtk3.20+ theme created using the awesome Nord color pallete.
Windows 10 Dark Theme
GTK theme based on the appearance of Windows 10 using the included dark mode.