There are 2 repositories under desktop-theme topic.
A modern flat theme with a combination of light and dark elements.
Numix is a modern flat theme with a combination of light and dark elements.
SciFi theme for Conky
A nerd's macOS desktop dashboard.
A Cinnamon theme that mimics Windows 8's style
A GTK 2&3 theme based on Material Design Refresh.
BlueCalm is a theme for various operating systems and browsers designed to look good and be calming.
Linux Mint Desktop Theme
Cerberus Heuristics Rainmeter Skin for my main PC
A Telegram Desktop theme based on Gruvbox.
[Discontinued] Recolored themes derived from Arc theme
Dark theme for telegram desktop and android application
This is a Purple Color Telegram Theme Designed by Huezo With the Name of cnBrendy. https://huezo.github.io/cnBrendy_purpleTheme/