There are 5 repositories under cinnamon-theme topic.
Graphical application for generating different color variations of Oomox (Numix-based) and Materia (ex-Flat-Plat) themes (GTK2, GTK3, Cinnamon, GNOME, Openbox, Xfwm), Archdroid, Gnome-Color, Numix, Papirus and Suru++ icon themes. Have a hack for HiDPI in gtk2. Its Base16 plugin also allowing a lot of app themes support like Alacritty, Emacs, GTK4, KDE, VIM and many more.
Windows 10 Light theme for Linux (GTK)
macOS theme for Gnome and GTK-based desktops
Dark version of macOS theme
Windows XP themes
Dark variant of Windows 10 theme
Home of the B00merang Redmond Collection themes for Linux
A Yaru and Libadwaita inspired theme for GTK desktops
Home for the Linux theme emulating Chrome OS
Mint-Yz: new colors for a new era
Modified version of Adapta Theme created by Adapta Project
A port of the Whistler theme that eventually got replaced by Luna in Windows 2001 (XP)
iOS theme for Linux desktops
OS X Leopard with Aqua-styled GTK widgets
Oomox-gtk-theme is a fork of Numix-gtk-theme with slightly different visual design choices and more customization capabilities. It can be used in Themix/Oomox app.
Nord version of Adapta Theme!
Android theme (based on Chrome OS code)
Theme mimicking Unity 8's design
Mac OS theme with the Aqua design guidelines
A set of themes for the Cinnamon desktop environment. Each theme includes a Cinnamon desktop theme along with Metacity theme for borders and controls and GTK2, GTK3.18 and GTK 3.20+ themes for applications.
Change desktop background to a high resolution picture of the current moon phase from NASA
Official Repository of the B00merang Collection
Old-fashioned theme based on overall appearance of OS X Mavericks
Nordic and Dracula dotfiles for Cinnamon
cinnamox-gtk-theme is used to build the Cinnamox GTK and Metacity themes. It is a fork of oomox-gtk-theme, which in turn is a fork of numix-gtk-theme.
A fork of the original Linux Mint theme with dark menus, more intensive green and some other modifications.
A Cinnamon theme that mimics Windows 8's style
Solaris 10 GTK theme for Linux
Modified version of Plata Theme created by Tista 500
FlatSurfaces Theme
Just a neutral theme for Cinnamon
Dynamic Cinnamon Theme Engine for Linux Mint 21
A neon flat theme based on arc-theme