Open-source theme software
845 open-source libraries, tools and applications tagged theme, ranked by how closely theme is their primary purpose, then by adoption and maintenance health. Each entry links to a page with sources, use cases and when to choose or avoid it.
845 products, primary matches first, then adoption-weighted; health v2 shown.
| Product | Health v2 | Stars | Maturity |
|---|---|---|---|
| MrOtherGuy/firefox-csshacks A collection of self-contained CSS stylesheets (userChrome.css/userContent.css hacks) for customizing the appearance of Mozilla Firefox. Us… | 75 | 4519 | active |
| home-sweet-gnome/dash-to-panel Dash to Panel is a Gnome Shell extension that turns the dash into an icon taskbar integrated into the main panel, combining app launchers a… | 94 | 4472 | active |
| keleus/BewlyCat BewlyCat is a browser extension for Bilibili, forked from BewlyBewly, that redesigns the Bilibili homepage and adds player and navigation e… | 84 | 4456 | active |
| Millennium Millennium is an open-source modding framework for the desktop Steam Client that lets users create, manage, and install custom CSS themes a… | 97 | 4444 | active |
| dempfi/ayu ayu is a bright, handcrafted color theme for Sublime Text available in dark, mirage, and light variants. It includes both UI themes and col… | 98 | 4419 | stable |
| dremin/RetroBar RetroBar is a Windows application that replaces the modern Windows taskbar with classic Windows 95, 98, Me, 2000, XP, or Vista style taskba… | 91 | 4417 | active |
| oxalorg/sakura Sakura is a minimal, classless CSS framework/theme that styles plain HTML without requiring any class names. You drop a single stylesheet i… | 53 | 4386 | stable |
| akinsho/bufferline.nvim A Neovim plugin written in Lua that renders a stylish, highly configurable buffer line (tab bar) at the top of the editor, with tabpage int… | 30 | 4377 | stable |
| vivek9patel/vivek9patel.github.io A personal portfolio website that simulates the Ubuntu 20.04 desktop environment in the browser, built with Next.js and Tailwind CSS. It re… | 32 | 4324 | active |
| JFormDesigner/FlatLaf FlatLaf is a modern, open-source, cross-platform Look and Feel library for Java Swing desktop applications with a clean, flat design. It sh… | 86 | 4307 | stable |
| sainnhe/everforest Everforest is a green-based, warm and soft color scheme for Vim and Neovim. It offers dark/light variants with hard, medium, and soft backg… | 67 | 4232 | active |
| papercss/papercss PaperCSS is a lightweight, 'less formal' CSS framework with a hand-drawn paper aesthetic, written in SCSS and distributed as compiled CSS v… | 34 | 4190 | active |
| xceedsoftware/wpftoolkit Extended WPF Toolkit is a large collection of WPF controls, components, and utilities for building Windows desktop applications in C#/XAML.… | 73 | 4171 | active |
| vinceliuice/Orchis-theme Orchis is a Material Design theme for GNOME/GTK-based desktop environments, built with SCSS and based on the materia-theme. It provides mul… | 80 | 4111 | active |
| EdenEast/nightfox.nvim Nightfox is a highly customizable colorscheme plugin for Vim and Neovim, written in Lua, offering seven variants such as Nightfox, Dayfox, … | 60 | 4088 | active |
| TDesign TDesign is an open-source enterprise design system from Tencent with consistent UI component libraries implemented for Vue (2 and 3), React… | 93 | 4077 | active |
| mirai-mamori/Sakurairo Sakurairo is a feature-rich, colorful WordPress theme rebuilt from the Sakura theme, with AI-assisted reading features and multilingual sup… | 78 | 4064 | active |
| new.css new.css is a classless CSS framework (~4.8kb) that styles semantic HTML to look modern without requiring any classes or configuration. It i… | 65 | 4049 | stable |
| joshdick/onedark.vim A dark Vim/Neovim colorscheme inspired by Atom's One Dark syntax theme, supporting GUI and 16/256/true-color terminals. It ships with integ… | 62 | 4003 | stable |
| sehmaschine/django-grappelli Django Grappelli is a grid-based skin/extension for the Django admin interface that provides a cleaner, more consistent look and feel. It a… | 75 | 3946 | active |
| rafaelmardojai/firefox-gnome-theme A CSS-based userChrome theme that makes Firefox look like a native GNOME Adwaita application. It is installed via scripts or the Add Water … | 82 | 3906 | active |
| sakofchit/system.css System.css is a pure-CSS library for building web interfaces styled after Apple's classic System OS (1984-1991), based on System 6. It prov… | 32 | 3894 | active |
| React95/React95 React95 is a React component library that recreates the Windows 95 UI aesthetic with modern React components. It includes packages for core… | 95 | 3836 | active |
| SimpleUI SimpleUI is a modern Django Admin theme built with Vue and Element UI, installed via pip and activated by adding it to settings.py with no … | 53 | 3829 | active |
| daltonmenezes/aura-theme Aura is a dark color theme distributed for many apps and editors, including VS Code, Neovim, Sublime Text, iTerm2, Slack, and Hyper. It als… | 45 | 3823 | active |
| stisla/stisla Stisla is a CSS component library built on a fixed set of design tokens, with components styled via BEM classes and customizable through CS… | 87 | 3764 | active |
| Solarized Solarized is a sixteen-color palette with precise CIELAB lightness relationships, distributed as color schemes for editors, IDEs, and termi… | 32 | 16019 | maintenance |
| BNDong/Cnblogs-Theme-SimpleMemory A beautification extension plugin for the Cnblogs (Blog Park) SimpleMemory blog theme, written primarily in CSS and JavaScript. It offers o… | 52 | 3711 | active |
| unfoldadmin/django-unfold Unfold is a modern Django admin theme and toolkit built on top of django.contrib.admin, providing a Tailwind CSS-based interface with dark … | 93 | 3708 | active |
| kepano/flexoki Flexoki is an open-source, high-contrast color scheme for prose and code, inspired by analog printing inks and warm paper shades. It provid… | 47 | 3706 | stable |
| Salesforce Lightning Design System Salesforce Lightning Design System (SLDS) is the CSS framework and markup guidelines for building UIs with the Salesforce Lightning look an… | 10 | 3702 | active |
| gruvbox gruvbox is a retro groove color scheme for Vim with pastel colors and light/dark mode switching. It offers extensive customization options … | 66 | 15754 | maintenance |
| heroui-inc/heroui-native HeroUI Native is an open-source React Native UI component library built on Tailwind CSS v4 via Uniwind, offering animated, accessible, and … | 84 | 3686 | active |
| pradyunsg/furo Furo is a clean, customizable HTML theme for the Sphinx documentation generator, distributed on PyPI. It offers responsive layouts, light/d… | 82 | 3598 | active |
| liangjingkanji/DrakeTyporaTheme A collection of twelve flat, elegant CSS themes for the Typora Markdown editor, including Material, Google, JetBrains, Vue, Juejin, Purple,… | 23 | 3550 | active |
| system-fonts/modern-font-stacks A collection of copy-paste CSS font-family stacks that use pre-installed system fonts, organized by typeface classification (System UI, Hum… | 61 | 3529 | active |
| probberechts/hexo-theme-cactus Cactus is a responsive, clean and simple theme for the Hexo static site generator, designed for personal websites and blogs. It offers mult… | 32 | 3516 | stable |
| nana-4/materia-theme Materia is a Material Design theme for GNOME/GTK-based desktop environments, supporting GTK 2/3/4, GNOME Shell, and other desktops like Xfc… | 53 | 3511 | active |
| Powerline Powerline is a statusline plugin for Vim, tmux, shell prompts, and window managers, and this repository provides pre-patched fonts containi… | 51 | 14823 | maintenance |
| sharu725/online-cv A minimal Jekyll theme for hosting your resume/CV as a static website on GitHub Pages. Content is edited from a single YAML data file, with… | 45 | 3489 | active |
| Rectify11/Installer Rectify11 is a Windows 11 customization tool that modifies system files and applies patches to make the OS UI more consistent, adding featu… | 46 | 3488 | active |
| Legcord/Legcord Legcord is a free, open-source custom Discord client that wraps the official Discord web app in an optimized Electron shell with built-in c… | 100 | 3482 | active |
| vincentdoerig/latex-css LaTeX.css is a minimal, almost class-less CSS library that makes any website look like a LaTeX document. It styles semantic HTML with optio… | 69 | 3481 | active |
| bdlukaa/fluent_ui An unofficial Flutter package implementing Microsoft's WinUI3/Fluent Design UI controls for building native-looking Windows apps. It provid… | 91 | 3475 | active |
| LianjiaTech/bruno Bruno is an enterprise-class Flutter UI component library extracted from real mobile products, offering high-quality out-of-the-box widgets… | 23 | 3431 | active |
| pctrade/end4-pC A personal fork of end-4's illogical-impulse (dots-hyprland) desktop shell, written in QML for Quickshell on Hyprland. It provides a Materi… | 60 | 3344 | active |
| ant-design/ant-design-mobile-rn Ant Design Mobile RN is a React Native implementation of the Ant Design Mobile UI specification, providing a configurable set of mobile UI … | 64 | 3341 | active |
| Base16 Tomorrow Theme is a collection of colour schemes for code editors and syntax highlighting, featuring muted colours across five variants lik… | 32 | 13984 | maintenance |
| Keyitdev/sddm-astronaut-theme A collection of modern, customizable themes for the SDDM display manager on Linux, written in QML with Qt6. It includes ten pre-made themes… | 75 | 3336 | active |
| seatonjiang/kratos Kratos is a WordPress theme focused on delivering a clean reading experience for blogs and content sites. It is written in PHP, installable… | 76 | 3326 | active |
| jkaving/intellij-colors-solarized A Solarized color scheme adaptation for IntelliJ IDEA, also usable with other JetBrains IDEs like PhpStorm and PyCharm. It provides light a… | 23 | 3242 | stable |
| Mahmud0808/Iconify Iconify is a free and open-source Android application for deep system UI customization on Android 12+ Pixel and AOSP-based ROMs. It lets us… | 92 | 3217 | active |
| Galio Galio is a free, MIT-licensed React Native UI framework offering ready-made components, typography, and a customizable base theme for build… | 54 | 3210 | active |
| lcpz/awesome-copycats A collection of ready-to-use themes and configurations for the Awesome window manager (version 4.x), written in Lua. It provides multiple d… | 43 | 3158 | active |
| luizdepra/hugo-coder Hugo Coder is a minimalist, responsive blog theme for the Hugo static site generator. It provides a clean, configurable design that can be … | 68 | 3116 | stable |
| halfmoonui/halfmoon Halfmoon is a highly customizable, drop-in CSS replacement for Bootstrap 5, built with CSS variables and three core themes with dark mode s… | 23 | 3109 | active |
| botoxparty/XP.css XP.css is a CSS framework that styles semantic HTML to look like Windows XP and Windows 98 interfaces. It is a JavaScript-free extension of… | 24 | 3108 | active |
| themepark-dev/theme.park theme.park is a collection of CSS themes and skins for 50+ self-hosted applications like Sonarr, Radarr, Plex, and Organizr. It ships theme… | 93 | 3094 | active |
| ColinDuquesnoy/QDarkStyleSheet A dark and light stylesheet/theme library for Qt applications, supporting PyQt and PySide bindings (Qt5/Qt6) in Python as well as C++. It p… | 34 | 3088 | active |
| LeftWM LeftWM is a tiling window manager for X11 written in Rust, focused on stability and performance while doing one thing well: managing window… | 85 | 3048 | active |
| GooseMod/OpenAsar OpenAsar is an open-source, drop-in replacement for Discord desktop's app.asar bootstrap file, written in JavaScript. It dramatically speed… | 81 | 3036 | active |
| siduck/chadwm Chadwm is a pre-configured, aesthetically enhanced build of the dwm tiling window manager for X11 Linux systems, with themes like Nord, Cat… | 55 | 3026 | active |
| weilanwl/coloruicss ColorUI is a vivid, high-saturation CSS component library for WeChat mini-programs and UniApp, invoked via class names after importing its … | 32 | 12374 | maintenance |
| material-extensions/vscode-material-icon-theme A Visual Studio Code extension that applies Material Design icons to files and folders in the editor's file explorer. It offers customizabl… | 95 | 2982 | active |
| Licoy/wordpress-theme-puock Puock is a high-quality, responsive WordPress theme written in PHP with light/dark mode, no-refresh (pjax) loading, and many built-in featu… | 97 | 2974 | active |
| sdras/night-owl-vscode-theme Night Owl is a Visual Studio Code color theme fine-tuned for nighttime coding, with a companion Light Owl theme for daytime use. Color choi… | 32 | 2956 | stable |
| adi1090x/plymouth-themes A collection of 80+ Plymouth boot splash themes ported from Android boot animations. It provides eye-candy graphical boot screens for Linux… | 23 | 2946 | active |
| rougier/nano-emacs A set of modular Emacs Lisp configuration files that give GNU Emacs a clean, consistent, minimalist look with light (Material) and dark (No… | 68 | 2938 | active |
| rafi/awesome-vim-colorschemes A curated collection of Vim and Neovim color schemes merged into a single repository for quick installation and use. It bundles dozens of p… | 32 | 2913 | active |
| justjanne/powerline-go powerline-go is a fast, low-latency Powerline-style shell prompt written in Go, supporting Bash, ZSH, Fish, and PowerShell. It displays git… | 70 | 2891 | stable |
| Darkkal44/qylock A collection of themed lockscreen and login-screen setups for SDDM and Quickshell on Linux, styled after games like NieR: Automata, Terrari… | 58 | 2888 | active |
| UN-GCPDS/qt-material A Python library providing Material Design-inspired stylesheets for Qt applications built with PySide2, PySide6, PyQt5, and PyQt6. It ships… | 32 | 2864 | active |
| seebi/dircolors-solarized A collection of dircolors theme files that apply the Solarized color scheme to GNU ls output in the terminal. It includes 256-color and ANS… | 66 | 2862 | stable |
| NLKNguyen/papercolor-theme PaperColor is a light and dark color scheme for Vim, inspired by Google's Material Design. It is optimized for fast loading, supports 4-bit… | 23 | 2845 | stable |
| panr/hugo-theme-terminal A minimal, retro terminal-style theme for the Hugo static site generator, featuring monospaced Fira Code typography, customizable duotone c… | 97 | 2808 | active |
| next-theme/hexo-theme-next NexT is an elegant, high-quality theme for the Hexo static site generator, offering four built-in layout schemes (Muse, Mist, Pisces, Gemin… | 90 | 2781 | active |
| material-components/material-web Material Web (@material/web) is a library of framework-agnostic web components implementing Google's Material 3 (Material You) design syste… | 84 | 11260 | maintenance |
| Nordic Nordic is a dark GTK 3.20+ desktop theme built on the Nord color palette. It styles Linux desktop environments like GNOME and pairs with a … | 62 | 2736 | active |
| sergiokopplin/indigo Indigo is a minimalist Jekyll template for personal blogs and portfolio sites, featuring light and dark themes. It is built with Jekyll, Sa… | 23 | 2719 | active |
| lobehub/sd-webui-lobe-theme Lobe Theme is a modern, highly customizable UI theme and extension for the Stable Diffusion WebUI (AUTOMATIC1111). It provides an exquisite… | 67 | 2716 | active |
| kikipoulet/SukiUI SukiUI is a desktop UI theme and control library for AvaloniaUI, providing light/dark modes, customizable color themes, and richly animated… | 82 | 2691 | stable |
| israel-dryer/ttkbootstrap ttkbootstrap is a theming extension for tkinter that applies Bootstrap-inspired flat themes to ttk widgets via a single bootstyle keyword. … | 96 | 2660 | active |
| SpikeHD/Dorion Dorion is a lightweight alternative Discord client built with Tauri and Rust that uses the OS-native webview instead of bundling Chromium. … | 100 | 2654 | active |
| sainnhe/gruvbox-material Gruvbox Material is a modified version of the Gruvbox color scheme for Vim with softer contrast and three palettes (material, mix, original… | 63 | 2649 | stable |
| ellisonleao/gruvbox.nvim gruvbox.nvim is a Lua port of the popular gruvbox colorscheme for Neovim, with treesitter and LSP semantic highlight support. It offers ext… | 54 | 2619 | active |
| BandarHL/BHTwitter BHTwitter is a tweak for the iOS Twitter/X app that adds features like ad removal, video downloads, themes, and UI customization. It can be… | 60 | 2602 | active |
| yhuse/SunnyUI SunnyUI.NET is an open-source C# WinForm UI control library, utility class library, and multi-page development framework built on .NET Fram… | 68 | 2591 | active |
| rdbende/Sun-Valley-ttk-theme Sun Valley ttk theme is a modern Tkinter/ttk theme inspired by the Windows 11 (Sun Valley/WinUI) visual style, distributed as the sv-ttk Py… | 30 | 2584 | active |
| Piebald Claude Code tweakcc is a command-line tool for customizing Claude Code's appearance (theme colors, thinking verbs) and inspecting or modifying its syst… | 82 | 2554 | active |
| anzhiyu-c/hexo-theme-anzhiyu A clean and beautiful Hexo blog theme, forked from hexo-theme-butterfly, written in Pug and Stylus. It provides a polished, feature-rich pe… | 67 | 2549 | active |
| Mahmud0808/ColorBlendr ColorBlendr is an open-source Android app for customizing Material You system colors on Android 12+ devices. It lets users generate palette… | 91 | 2541 | active |
| community-archive/obsidian-style-settings An Obsidian plugin that provides a dynamic settings UI for adjusting CSS variables defined by themes, plugins, and CSS snippets. Theme and … | 61 | 2527 | active |
| wxxsw/SwiftTheme SwiftTheme is a Swift framework for managing themes and skins in iOS and tvOS apps, enabling runtime switching between light and dark appea… | 66 | 2521 | stable |
| Liniyous/ElaWidgetTools ElaWidgetTools is a C++ component library that brings Microsoft Fluent UI styling to Qt Widgets applications. It provides a rich set of cus… | 60 | 2518 | active |
| Akifyss/obsidian-border A clean and highly customizable CSS theme for Obsidian.md with features like card layout, auto-hiding sidebars, and multiple visual presets… | 76 | 2513 | active |
| projekt0n/github-nvim-theme A collection of GitHub-style colorschemes for Neovim written in Lua. It provides multiple GitHub color variants (dark, light, dimmed, high … | 23 | 2471 | active |
| khang-nd/7.css 7.css is a JS-independent, tree-shakeable CSS framework that styles semantic HTML to faithfully recreate the Windows 7 (Aero) user interfac… | 78 | 2458 | active |
| webtui/webtui WebTUI is a modular CSS library that recreates the look and feel of terminal user interfaces in the browser. It ships as an npm package wit… | 80 | 2447 | active |
| mui-treasury MUI Treasury is a component registry for Material UI providing hand-crafted components, blocks, and a refined theme for building modern Rea… | 66 | 2440 | active |
| wechat-miniprogram/weui-miniprogram WeUI-miniprogram is the official WeChat mini-program component library built on the WeUI style system, providing UI components with a nativ… | 55 | 2429 | stable |