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 |
|---|---|---|---|
| mui/material-ui Material UI is an open‑source React component library that implements Google's Material Design. It provides a comprehensive set of pre‑buil… | 95 | 99233 | active |
| Bulma Bulma is a free, open-source modern CSS framework based on Flexbox and CSS Grid, providing ready-to-use frontend components via a single CS… | 69 | 50038 | stable |
| styled-components styled-components is a CSS‑in‑JS library that lets you write actual CSS syntax inside JavaScript/TypeScript and bind it to React components… | 95 | 41101 | active |
| Mantine Mantine is a fully featured React component library offering over 120 customizable UI components and 70+ hooks. It provides theming, dark m… | 96 | 31849 | active |
| the1812/Bilibili-Evolved A powerful userscript that enhances the Bilibili video website with a modular component system for features like UI tweaks, video downloadi… | 93 | 30628 | active |
| mbadolato/iTerm2-Color-Schemes iTerm2-Color-Schemes is a curated collection of over 600 terminal color schemes for iTerm2 and many other terminal emulators. It includes a… | 98 | 27244 | active |
| Spicetify Spicetify is a command‑line tool that lets you fully customize the official Spotify desktop client. It supports theming, extensions, and cu… | 99 | 25064 | active |
| Dracula Theme Dracula Theme is a dark color scheme that works across 400+ applications and editors. It provides a unified look for terminals, IDEs, brows… | 66 | 23601 | active |
| darkreader/darkreader Dark Reader is an open-source MIT-licensed browser extension that analyzes web pages and generates a customizable dark mode to reduce eyest… | 98 | 22455 | active |
| rsms/inter Inter is an open-source (OFL-1.1) sans-serif typeface family designed for computer screens, featuring a variable font format, true italics,… | 23 | 19917 | stable |
| Catppuccin Catppuccin is a community-driven pastel color scheme with ports for hundreds of applications, editors, terminals, and platforms. The main r… | 62 | 19815 | active |
| tusen-ai/naive-ui Naive UI is a Vue 3 component library with 90+ components written in TypeScript. It offers a type-safe theme customization system, tree-sha… | 73 | 18566 | active |
| eythaann/Seelen-UI Seelen UI is a fully customizable desktop environment replacement for Windows 10/11, built with Tauri and Rust. It replaces the taskbar, do… | 89 | 18021 | active |
| vim-airline vim-airline is a Vim plugin that provides a lean, fast statusline and tabline for the Vim editor, displaying mode, VCS branch info, filenam… | 77 | 17970 | stable |
| Pico CSS Pico CSS is a minimal, lightweight CSS framework that styles semantic HTML elements directly, requiring almost no classes or JavaScript. It… | 67 | 16865 | stable |
| dots-hyprland A usability-first dotfiles bundle that turns Hyprland (a Wayland compositor) into a polished, Material Design-styled Linux desktop shell, b… | 80 | 16335 | active |
| MaterialDesignInXAML/MaterialDesignInXamlToolkit A comprehensive Material Design theme and control library for WPF applications in C# and VB.NET. It provides styled versions of all major W… | 81 | 16264 | stable |
| alshedivat/al-folio al-folio is a clean, responsive Jekyll starter theme for academic personal websites, featuring publication rendering from BibTeX, blog post… | 95 | 16231 | active |
| Fei-Away/Codex-Dream-Skin Codex Dream Skin is a theming/skinning tool that lets users apply custom visual themes to the official Codex/ChatGPT desktop app via local … | 80 | 14992 | active |
| thomaspark/bootswatch Bootswatch is a collection of free, open-source themes for the Bootstrap CSS framework, available as pre-compiled CSS, Sass files, via CDN,… | 67 | 14751 | stable |
| React Native Paper React Native Paper is a cross-platform UI component library for React Native that implements Google's Material Design (including Material Y… | 91 | 14467 | stable |
| Playnite Playnite is an open-source video game library manager and launcher that unifies games from third-party services like Steam, Epic, GOG, EA A… | 99 | 14233 | active |
| adityatelange/hugo-PaperMod PaperMod is a fast, clean, and responsive theme for the Hugo static site generator, built for blogs and portfolio sites. It ships with ligh… | 62 | 13973 | stable |
| Lawnchair Launcher Lawnchair is a free, open-source home screen launcher for Android built on AOSP's Launcher3, porting Pixel Launcher features and adding ric… | 86 | 13742 | active |
| TomSchimansky/CustomTkinter CustomTkinter is a Python UI library built on Tkinter that provides modern, fully customizable widgets with light/dark appearance modes and… | 69 | 13580 | active |
| segmentio/evergreen Evergreen is Segment's open-source React UI framework and design system for building enterprise-grade web applications. It provides polishe… | 59 | 12424 | stable |
| jdan/98.css 98.css is a CSS-only design system that styles semantic HTML to look like the classic Windows 98 user interface. It ships no JavaScript, ma… | 37 | 11542 | stable |
| vira-soft/vira-assets Vira Theme is a premium color theme and icon set for Visual Studio Code, positioned as the official successor to the popular Material Theme… | 66 | 11303 | active |
| UI Kitten UI Kitten is a React Native UI component library based on the Eva Design System, offering 30+ production-ready components with light/dark t… | 98 | 10665 | active |
| jnsahaj/tweakcn tweakcn is a visual no-code theme editor for shadcn/ui and Tailwind CSS, letting users customize component themes through a web interface. … | 62 | 10453 | active |
| DouyinFE/semi-design Semi Design is a modern, comprehensive React UI library and design system maintained by Douyin (TikTok) frontend team, offering 80+ high-qu… | 82 | 10408 | active |
| Gogh-Co/Gogh Gogh is a shell-script-based collection of color schemes for terminal emulators such as Gnome Terminal, Pantheon Terminal, Tilix, XFCE4 Ter… | 99 | 10337 | active |
| XIU2/UserScript A collection of personal Tampermonkey/GreasyFork userscripts by X.I.U, including GitHub high-speed download enhancements, AutoPager infinit… | 74 | 10069 | active |
| StylishThemes/GitHub-Dark A dark theme userstyle (user.css) for the GitHub website, applied via the Stylus browser extension. It restyles GitHub's interface with a d… | 77 | 9987 | active |
| MahApps/MahApps.Metro MahApps.Metro is a UI toolkit for WPF that restyles common controls with a modern Metro/Modern look and adds custom controls inspired by Wi… | 68 | 9834 | stable |
| lepoco/wpfui WPF UI is a C# library that brings Fluent Design (Windows 11 style) to Windows Presentation Foundation applications, restyling base control… | 78 | 9710 | active |
| HyDE HyDE is a shell-based theming and configuration framework that turns Hyprland-based Linux systems into a fully customized, aesthetic deskto… | 87 | 9673 | active |
| vinceliuice/WhiteSur-gtk-theme WhiteSur GTK Theme is a macOS Big Sur-style theme for GTK-based Linux desktops, supporting GTK3, GTK4, GNOME Shell, GDM, Flatpak apps, and … | 91 | 9314 | active |
| garrettj403/SciencePlots A Python library providing Matplotlib style sheets that format figures for scientific papers, theses, and presentations. It includes styles… | 77 | 9287 | stable |
| BetterDiscord BetterDiscord is a client modification for the Discord desktop app that adds a plugin loader, theme engine, and CSS editor for deep customi… | 99 | 9285 | active |
| adi1090x/rofi A large collection of Rofi-based custom applets, launchers, and power menus written in shell scripts. It provides ready-made themes and men… | 67 | 8812 | active |
| BewlyBewly/BewlyBewly BewlyBewly is a browser extension that redesigns the Bilibili homepage with a modern UI inspired by YouTube, Vision OS, and iOS, including … | 10 | 8809 | active |
| radix-ui/themes Radix Themes is an open-source React component library with pre-styled, accessible components that work out of the box with minimal configu… | 58 | 8721 | active |
| bwya77/vscode-dark-islands A dark color theme for VS Code and VSCodium inspired by the easemate IDE and JetBrains Islands theme, featuring floating glass-like panels,… | 51 | 8533 | active |
| Butterfly Hexo Theme Butterfly is a modern, feature-rich theme for the Hexo static site generator, built with pug templates and stylus styles. It provides a car… | 95 | 8367 | active |
| folke/tokyonight.nvim Tokyo Night is a dark and light Neovim colorscheme written in Lua, ported from the VS Code TokyoNight theme. It supports LSP, Treesitter, a… | 65 | 8217 | stable |
| fluid-dev/hexo-theme-fluid Fluid is an elegant Material Design theme for the Hexo static site generator, installable via npm for Hexo 5.0+. It provides a polished blo… | 68 | 8167 | active |
| nvim-lualine/lualine.nvim lualine.nvim is a fast, highly configurable statusline plugin for Neovim written in pure Lua. It loads only the components you configure, k… | 67 | 8141 | active |
| zhiyiYo/PyQt-Fluent-Widgets A fluent design widget library for PyQt5/PyQt6/PySide2/PySide6 that brings Windows 11 Fluent Design components to Qt applications. It provi… | 62 | 8113 | active |
| PapirusDevelopmentTeam/papirus-icon-theme Papirus is a free and open source SVG icon theme for Linux, based on the Paper Icon Set, with thousands of pixel-perfect icons for apps, ac… | 83 | 8103 | active |
| jakubkrehel/skills A collection of Markdown-based agent skills for AI coding assistants (Claude Code, Codex, Opencode) that guide building polished user inter… | 58 | 8005 | active |
| ohmybash/oh-my-bash Oh My Bash is a community-driven framework for managing bash shell configuration, bundling plugins, themes, and helpers, with an auto-updat… | 74 | 7713 | active |
| sindresorhus/caprine Caprine is an unofficial, privacy-focused Facebook Messenger desktop client built with Electron. It offers themes, keyboard shortcuts, menu… | 52 | 7392 | stable |
| React95 React95 is a React component library that recreates the Windows 95 user interface aesthetic using styled-components. It provides themed, re… | 23 | 7270 | active |
| SublimeText/Spacegray Spacegray is a set of hyperminimal UI themes for Sublime Text, each paired with a Base16 color scheme. It ships in several flavors (Dark, L… | 53 | 7207 | stable |
| wix/react-native-ui-lib A UI toolset and components library for React Native by Wix, providing a wide range of prebuilt components and a design system foundation (… | 91 | 7156 | active |
| LiteLoaderQQNT LiteLoaderQQNT is an open-source plugin loader for QQNT (the Electron-based QQ desktop client) that lets users inject and manage third-part… | 10 | 7057 | active |
| openstyles/stylus Stylus is a browser extension for Chrome, Firefox, and Chromium-based browsers that lets users restyle websites by installing and managing … | 96 | 6898 | active |
| Nord Nord is an arctic, north-bluish color palette of sixteen carefully selected dimmed pastel colors designed for code syntax highlighting and … | 23 | 6888 | stable |
| kristopolous/BOOTSTRA.386 BOOTSTRA.386 is a Twitter Bootstrap theme (supporting Bootstrap v2 through v5) that styles webpages to look like 1980s DOS-era graphical in… | 52 | 6875 | active |
| itchyny/lightline.vim lightline.vim is a lightweight and highly configurable statusline and tabline plugin for Vim. It emphasizes minimalism, easy customization … | 76 | 6869 | stable |
| Hugo Theme Stack A card-style Hugo theme designed for bloggers, built with SCSS and vanilla JavaScript for lightweight, fast sites. It ships with dark mode,… | 82 | 6477 | active |
| rebelot/kanagawa.nvim Kanagawa.nvim is a dark colorscheme for NeoVim inspired by Katsushika Hokusai's painting, written in Lua. It offers extensive TreeSitter an… | 65 | 6403 | active |
| pacocoursey/next-themes next-themes is a small React library providing theme management for Next.js apps, supporting system preference, custom themes, and flash-fr… | 61 | 6336 | stable |
| adi1090x/polybar-themes A large collection of ready-made themes for the Polybar status bar, offering many styles, colors, and variants for Linux desktop environmen… | 73 | 6253 | active |
| spicetify/spicetify-themes A community-maintained collection of CSS themes for customizing the Spotify desktop client via the Spicetify CLI. It includes multiple them… | 75 | 6087 | active |
| Keldos-Li/typora-latex-theme A Typora theme that restyles the Markdown editor to look like Chinese LaTeX typesetting, written in SCSS. It targets lightweight academic w… | 59 | 5981 | active |
| grassmunk/Chicago95 Chicago95 is a Windows 95-style total conversion theme for XFCE/Xubuntu on Linux, including GTK2/GTK3 themes, icons, an XFWM window manager… | 66 | 5965 | active |
| Themer Themer is a theme generator that takes a set of colors and outputs themes for editors, terminals, and many other apps, plus matching deskto… | 59 | 5853 | active |
| daattali/beautiful-jekyll Beautiful Jekyll is a ready-to-use Jekyll theme/template for quickly building beautiful personal sites, blogs, and simple project websites,… | 57 | 5827 | stable |
| ryanoasis/vim-devicons A Vim plugin that adds file type glyph icons to popular Vim plugins like NERDTree, vim-airline, CtrlP, lightline, and vim-startify. It is h… | 23 | 5807 | stable |
| UI Kitten ngx-admin is a customizable, responsive admin dashboard template built on Angular and the Nebular UI framework, with 40+ components and 60+… | 23 | 25679 | maintenance |
| solstice23/argon-theme Argon is a lightweight, clean, and highly customizable WordPress theme built on the Argon Design System. It offers extensive customization … | 61 | 5588 | active |
| jerrykuku/luci-theme-argon Argon is a clean, modern theme for the OpenWrt LuCI web administration interface, built with Less. It supports light/dark mode switching, c… | 95 | 5533 | active |
| dream7180/foobox-cn foobox-cn is a DUI (Default User Interface) skin/theme configuration for the foobar2000 audio player, built on the JSplitter (Spider Monkey… | 88 | 5532 | active |
| argyleink/open-props Open Props is a collection of 500+ CSS custom properties (design tokens) covering colors, gradients, shadows, typography, easings, animatio… | 63 | 5531 | active |
| Splode/pomotroid Pomotroid is a free, open-source, visually-pleasing Pomodoro timer desktop app built with Tauri 2, Rust, and Svelte 5. It offers configurab… | 88 | 5522 | stable |
| kepano/obsidian-minimal Minimal is a highly customizable, distraction-free CSS theme for the Obsidian note-taking app, available for desktop, mobile, and tablet. I… | 98 | 5443 | active |
| system-ui/theme-ui Theme UI is a React library for building themeable user interfaces based on constraint-based design principles. It provides an sx prop and … | 67 | 5399 | active |
| blinkfox/hexo-theme-matery hexo-theme-matery is a feature-rich Hexo blog theme built with Material Design and responsive layout. It provides carousels, waterflow post… | 23 | 5357 | stable |
| varletjs/varlet Varlet is a Vue 3 component library based on Material Design 2 and 3, offering 70+ lightweight general-purpose components for mobile and de… | 91 | 5334 | active |
| robb0wen/synthwave-vscode Synthwave '84 is a retro 1980s-inspired color theme for Visual Studio Code, featuring neon colors influenced by synthwave music and artwork… | 43 | 5291 | active |
| vscode-icons/vscode-icons A Visual Studio Code extension that provides file and folder icons for the editor's file explorer. It supports icon customization, custom i… | 94 | 5171 | active |
| andybrewer/mvp MVP.css is a minimalist classless CSS stylesheet that styles semantic HTML elements out of the box, with no class names or framework conven… | 84 | 5128 | active |
| xuexiangjys/XUI XUI is a lightweight Android native UI framework written in Java that provides a comprehensive set of pre-styled UI components such as butt… | 27 | 5080 | stable |
| saicaca/fuwari Fuwari is a static blog template built with Astro and Tailwind CSS, featuring smooth animations, light/dark mode, and customizable theming.… | 56 | 5038 | active |
| mylinuxforwork/dotfiles ML4W OS is a full-featured dotfiles configuration that turns Hyprland, a dynamic tiling Wayland window manager, into a complete desktop env… | 87 | 5028 | active |
| Notion Enhancer notion-enhancer is a mod loader and customiser for the Notion productivity workspace, adding features like in-app tabs, colour themes, side… | 50 | 5021 | active |
| Animal Island UI A React + TypeScript UI component library styled after Nintendo's Animal Crossing: New Horizons, with 35 accessible components and original… | 82 | 5011 | active |
| Kinnara/ModernWpf ModernWPF is a community-maintained library that brings Fluent Design styles and WinUI-inspired controls to Windows Presentation Foundation… | 86 | 4960 | active |
| Aliucord Aliucord is a rootless modification of the legacy Discord Android app that adds a plugin system with 280+ plugins, 250+ custom themes, an i… | 67 | 4882 | active |
| nostalgic-css/NES.css NES.css is a CSS framework that styles web components in a NES/Famicom 8-bit retro aesthetic. It provides prebuilt styled components (butto… | 23 | 21835 | maintenance |
| GetWidget GetWidget is an open-source Flutter UI kit library offering 1,000+ production-ready, themable widgets such as buttons, cards, carousels, fo… | 57 | 4833 | active |
| LazoVelko/Pokemon-Terminal A Python CLI tool that sets your terminal background (and optionally desktop wallpaper) to one of 719 Pokemon-themed images, selectable by … | 50 | 4809 | active |
| gh0stzk/dotfiles A complete, preconfigured BSPWM desktop environment for Arch Linux distributed as dotfiles, featuring 18 handcrafted themes with an on-the-… | 77 | 4758 | active |
| liquidprompt/liquidprompt Liquid Prompt is an adaptive, carefully designed shell prompt for Bash and Zsh, written in portable Shell. It displays contextual, useful i… | 80 | 4684 | stable |
| Fusion Alibaba Fusion Next (@alifd/next) is a configurable, enterprise-class React UI component library for building backend/admin systems. It int… | 80 | 4680 | stable |
| vinceliuice/grub2-themes A collection of modern-looking GRUB2 bootloader themes (Tela, Vimix, Stylish, WhiteSur) installed via a shell script or NixOS flake module.… | 67 | 4641 | active |
| Clooos/Bubble-Card Bubble Card is a minimalist and highly customizable card collection for Home Assistant dashboards, offering modern pop-ups, buttons, slider… | 93 | 4639 | active |
| Lxtharia/minegrub-theme A GRUB bootloader theme that restyles the boot menu to look like Minecraft's main menu, with randomized backgrounds and splash text. It inc… | 67 | 4632 | active |
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