Open-source alternatives to Catppuccin

shadcn-svelte is a collection of accessible and customizable user interface elements for Svelte applications. Rather than being distributed as a traditional dependency, these components are provided as source code that is copied directly into the project codebase. The library utilizes a registry-based distribution system, allowing users to install specific UI blocks and components via a command-line interface. This system uses JSON metadata to define dependencies and file paths, while a bootstrapping process automates the configuration of styles and CSS variables. The project integrates Tail

Zed is a terminal-based code editor built in Rust that provides a full-featured editing experience with familiar keybindings, mouse support, and multiple cursors. It runs entirely in the terminal while offering capabilities typically found in graphical editors, including split panes, a command palette, and integrated language server protocol support for real-time diagnostics, completions, go-to-definition, and code actions across multiple languages. The editor distinguishes itself through a plugin system that runs sandboxed TypeScript plugins in a QuickJS runtime, with an asynchronous bridge

NvChad is a Neovim configuration framework that provides a pre-configured base setup with a refined interface and custom defaults. It serves as a modular system for managing the editor environment through a curated plugin suite and configuration files written in Lua. The framework features a lazy-loading plugin manager designed to minimize startup time and improve responsiveness by initializing components on demand. It also includes a built-in theme engine with a dedicated picker for switching between different visual styles and aesthetic configurations. The project covers a broad range of d

Nord is a color palette design system and standardized color reference providing curated blue-toned palettes for user interfaces, design software, and environment themes. It defines a UI color scheme consisting of dimmed pastel palettes intended for flat, minimalist aesthetics. The system functions as a cross-platform theme specification to unify the appearance of code editors, shell terminals, and operating system environments. It includes importable color swatches compatible with native formats for use in professional design tools. The project covers cross-application visual standardizatio

This project is a comprehensive productivity guide and configuration reference for the VS Code editor. It provides a curated collection of shortcuts, configuration tips, and tutorials designed to improve efficiency and optimize the daily coding workflow. The resource covers advanced AI-assisted development, including the integration of autonomous agents, custom prompt files, and AI-powered coding assistants for task automation and code generation. It also provides specialized guidance on integrated terminal management, such as configuring shell profiles and automating command execution. Addi

Grav is a flat-file content management system that eliminates the need for a traditional database by storing site content and configuration in human-readable Markdown and YAML files. Built as a modular PHP web framework, it uses a hierarchical page routing system where the physical directory structure directly determines the site's URL paths. The platform is distinguished by its event-driven plugin architecture and a command-line interface that prioritizes system administration, deployment, and maintenance tasks. It utilizes a blueprint-driven system to generate administrative forms from stru

This project is a command-line utility and development framework designed to modify, extend, and customize the Spotify desktop client. It functions as a binary patching engine that injects custom scripts, stylesheets, and interface components directly into the host application, enabling users to alter visual themes and add new functionality. The tool distinguishes itself by providing a comprehensive development environment for building modular extensions and custom applications. It includes a hot-reloading pipeline for rapid iteration, a declarative library for constructing interactive UI pan

Aura Theme is a comprehensive set of dark color palettes, development environment styles, and digital assets designed to create a unified visual identity across various software targets. It provides a cohesive dark mode system for code editors, terminal emulators, and desktop window managers, complemented by a collection of high-resolution dark wallpapers for desktop and mobile environments. The project includes a theme porting tool and a UI color token system that replace hardcoded hex values with dynamic accent tokens. This framework enables cross-application theme porting, allowing a consi

GitHub-Dark is a browser extension theme and collection of user style sheets designed to provide a comprehensive dark mode aesthetic for the GitHub interface. It functions by injecting custom style rules directly into the browser to override default website colors, fonts, and layout properties, aiming to improve visual comfort and readability during extended use. The project distinguishes itself through its focus on deep integration and visual consistency. It includes specialized support for syntax highlighting across various programming languages and notebook environments, ensuring that code

Monocraft is a programming font customization project designed to apply a game-inspired typographic theme to development environments. It renders text using specialized monospaced typefaces that recreate the visual style of game user interfaces. The project focuses on rendering a galactic alphabet by mapping specific Unicode codepoints to unique glyphs. It utilizes OpenType ligature substitution to combine character sequences into single glyphs for programming operators and arrows. The system ensures strict vertical alignment through a monospace grid and handles character rendering via speci

Framework7 is a mobile user interface framework and single-page application system designed to build responsive web applications with native iOS and Android appearances. It provides a comprehensive library of pre-styled components and a layout engine to create native-style user interfaces across multiple platforms. The framework utilizes a platform-aware theming system that adapts visual styles and color schemes based on detected device settings. It incorporates native mobile behaviors through a dedicated UI kit, including specialized interaction patterns such as pull-to-refresh and swipeable

This project is a Vim colorscheme and theme framework that implements the Solarized color palette. It is designed as a precision-engineered set of low-contrast colors to reduce visual fatigue and provide a consistent reading experience within the Vim text editor. The system includes a terminal color adapter that adjusts highlight groups and color mapping based on the specific capabilities of the terminal emulator. It further supports dynamic theme switching, allowing users to swap between light and dark background modes. The framework provides capabilities for UI customization, including the

Theme-ui is a React theme framework and CSS-in-JS utility used for building themeable user interfaces. It functions as a design system tool that establishes centralized, constraint-based scales for colors, typography, and spacing to ensure visual consistency across applications. The framework distinguishes itself through an array-based responsive shorthand for mobile-first layouts and a dedicated color mode manager that synchronizes with browser preferences and persists user selections. It also features a system for creating named style variants to control component appearance via properties

Chroma is a syntax highlighter written in Go that converts raw source code into colorized text or HTML. It identifies programming languages and tokens using language-specific lexers to produce highlighted output for various environments. The project utilizes a theme-driven colorization system that decouples token types from final colors through an intermediate style mapping layer. This allows for custom code theming by mapping specific token categories to foreground and background colors. The system covers language identification, terminal text formatting for ANSI-compatible viewers, and web

Windows-Auto-Night-Mode is a theme scheduler and system theme controller for Windows that automatically switches the operating system between light and dark modes. It manages these transitions based on specific times of day or solar events, such as sunrise and sunset. The tool functions as a power-aware manager that can adjust theme behavior based on battery status and suppress visual changes during active gaming. It synchronizes multiple visual elements, including wallpapers, accent colors, and mouse cursors, to ensure consistency during theme transitions. The project includes capabilities

This project is a CSS theme for the Firefox web browser designed to integrate its user interface with the GNOME desktop environment. It implements a visual layer that aligns browser elements with the typography, spacing, and overall design language of the GTK system. The theme provides multiple color palettes, including standard dark mode and high-contrast OLED black variants. It also includes system icon integration, allowing the browser to replace internal images with system-level icons to match the host operating system's aesthetics. Beyond color and iconography, the project covers interf

Tailwind CSS Typography is a plugin for the Tailwind CSS framework that provides hand-tuned typographic defaults for blocks of vanilla HTML content, such as content from Markdown or a CMS. It applies beautiful prose styles to HTML content using a single class, eliminating the need for custom CSS to style rich text. The plugin distinguishes itself by offering deep customization and control over typography. Users can adjust the overall font size of prose content across five predefined sizes, select from five built-in gray-scale palettes to match a project's color scheme, and seamlessly adapt ty

This project is a cross-editor theme library and mapper that provides a curated collection of syntax highlighting color schemes. It uses a JSON theme specification to define visual roles and color palettes as immutable data structures, ensuring these definitions remain consistent across different software output targets. The system functions as a declarative style generator, translating abstract color definitions into the specific configuration formats required by various programming environments. By using a template-based approach, it maps a single source of truth for color definitions to mu

This project is an extension for the Eclipse integrated development environment that enables users to modify the visual appearance of their workspace. It functions as a configuration utility that allows for the application and customization of color schemes across both code editors and interface components. The system utilizes a registry-driven approach to override default platform settings, injecting user-defined property values to alter the environment's aesthetic. It employs a translation layer that maps abstract theme definitions to specific UI elements, ensuring that syntax highlighting

Brooklyn is a web-based visualizer and animation loop player that functions as an Apple-inspired screensaver. It uses an HTML5 Canvas rendering pipeline to draw high-fidelity motion graphics to a screen buffer for full-screen display. The project recreates specific visual animations from a 2018 Apple technology event. It features a customizable animation loop where the playback sequence and repetition counts can be configured. The system includes a theme-driven color mapping engine that allows users to toggle between light and dark color schemes. Playback is managed through state-driven tran

This project is a cross-platform UI toolkit and universal UI framework providing a collection of pre-styled interface components for building mobile and web applications. It functions as a mobile design system and themed component library, allowing developers to maintain a cohesive visual language across different screens and devices using a shared codebase. The toolkit centers on a themed component architecture that supports global and component-level style configurations. This enables the definition of colors and property defaults in a central location to ensure consistent branding and a un

Pywal is an image-based theme engine and dynamic color scheme generator that extracts dominant colors from images to create coordinated system-wide color palettes. It functions as a cross-application theme synchronizer and terminal color palette manager, updating interface colors and environment configurations in real-time. The system synchronizes generated palettes across third-party software, window managers, and supported hardware, including RGB backlight controllers for keyboards and laptops. It integrates wallpaper management by applying a source image as the system background while simu

This project is a Linux SVG icon theme and a collection of scalable vector assets designed to create a unified visual style across desktop environments. It provides a comprehensive library of images for applications and system folders, alongside a customization suite for adapting icon colors and styles to match various system schemes. The project includes a folder color management system for modifying directory colors globally or individually. It also features a hardcoded icon override tool that replaces absolute-path icons in desktop files and tray areas to maintain theme consistency, extend

Nord is a cross-platform design palette and CSS color system providing a curated set of dimmed pastel colors for building consistent user interfaces and code themes. It functions as a UI design framework that delivers a standardized collection of colors through multiple file formats for use in development tools and graphic design software. The system is defined by its dual-mode visual theme, which coordinates complementary light and dark color sets to maintain a consistent visual hierarchy across different brightness modes. It also includes a syntax highlighting theme that maps specific palet

Themer is a color palette theme generator that produces matching color themes for editors, terminals, and other applications from a single color set. It accepts Base16 YAML color schemes as input and can generate themes programmatically through an async generator function or from the command line. The project distinguishes itself by supporting custom color sets and custom template render functions, allowing users to define their own output formats for unsupported applications. It also generates matching desktop wallpapers in SVG or PNG format from the same color palette used for application t

CustomTkinter is a Python GUI framework and library used to build modern desktop applications. It serves as a toolkit for creating cross-platform graphical interfaces with a specific focus on theme-aware components and high-resolution display support. The library provides a set of widgets based on the Tkinter framework that synchronize with operating system appearance settings. It includes a theme engine to manage light and dark modes and integrates system-level scaling to ensure visual consistency across different monitors and display densities. The toolkit covers graphical interface compos