There are 3 repositories under themer topic.
A graphical UI for themer. Replaced by Progressive Web App at https://themer.dev.
An unopinionated, scalable, tailwindcss theming solution
A simple, minimal highlighter plugin for neovim
This plugin enables you use different themes on one site individual set per page or collection.
A little project to easily create custom github themes using refined github
A theme manager for the new Windows Terminal
Theme GNOME, Cinnamon, Budgie and XFCE
Humanoid color set for themer.
A dark, low contrast color scheme with warm colors made with themer
Bonker is a customization tool, crafted to suit my specific needs, but if you find a use for it, by all means. Go Crazy With It As I Have.
A chrome extension to personalize the YouTube website.