Open-source alternatives to Darkreader

This project is a reference library and collection of practical code samples for building browser extensions using WebExtensions APIs. It provides implementation guides and functional examples for core extension components, including content scripts, background processes, and browser action popups. The repository focuses on demonstrating specific implementation patterns for browser UI customization and web page manipulation. It includes samples for creating sidebars, context menus, and options pages, as well as techniques for injecting scripts and styles to alter DOM elements and page appeara

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

Firefox is a cross-platform web browser engine designed to render web content, execute JavaScript, and manage secure browsing sessions. It utilizes a multi-process isolation architecture that distributes browser tasks across independent operating system processes to ensure stability and prevent site-specific failures from impacting the entire application. The engine incorporates a sandboxed execution environment to restrict web content and untrusted scripts to isolated memory compartments, enforcing security policies that prevent unauthorized access to system resources. The project distinguis

Vuestic Admin is a Vue 3 administration dashboard template and framework designed for building back-office applications and internal management consoles. It provides a ready-to-use foundation that integrates Vite, Pinia, and Tailwind CSS to accelerate the development of administrative interfaces. The project features a themed UI management system with a central configuration engine for global styles and branding, including a toggleable dark mode. It also includes a mocked API development environment that intercepts network requests and provides static data stubs for interface testing and rapi

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

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

Noctalia Shell is a modular Wayland desktop shell that provides a user interface consisting of status bars, launchers, and notifications for Wayland compositors. It is built as a plugin-based desktop environment that utilizes declarative configuration for managing system defaults, wallpapers, and plugin installations. The project features a dynamic desktop theming engine that extracts color palettes from wallpapers to theme the shell and external applications. This is supported by an inter-process communication bridge that exposes endpoints, allowing external scripts and keybindings to trigge

Hydra is a cross-platform desktop application designed to serve as a centralized game library manager. It consolidates video games from multiple sources and platforms into a single, searchable interface, allowing users to organize their collections and manage installations through a unified dashboard. The application distinguishes itself through extensive support for interface personalization and data portability. Users can modify the visual appearance and notification sounds of the launcher by creating or installing community-shared themes. Furthermore, the tool includes integrated cloud syn

Water.css is a minimalist, classless CSS framework and library designed to apply visual improvements directly to standard HTML elements. It maps curated styles to native tags, allowing for clean and professional website interfaces without the need for custom class names. The library features an adaptive theme system that automatically switches between light and dark color schemes based on operating system user preferences. It also uses root-level CSS variables, enabling the customization of base colors and spacing to create unique visual identities. The project provides capabilities for rapi

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

UnoCSS is an atomic CSS engine and utility-first framework that generates styles on-demand based on the specific classes used in your source code. By scanning your project files during the build process, it produces only the CSS necessary for your application, effectively minimizing bundle size and eliminating unused styles. The engine distinguishes itself through a highly modular, configuration-driven architecture that allows for deep customization of design tokens, rules, and presets. It supports advanced styling patterns such as attribute-based styling, tag-based styling, and dynamic varia

bpytop is a cross-platform terminal system monitor and resource dashboard for Unix-like operating systems. It provides a real-time interface for tracking processor, memory, disk, and network usage across Linux, macOS, and FreeBSD. The tool functions as a process manager, allowing users to filter, sort, and terminate system processes using a tree-view layout. It also serves as a hardware health monitor by tracking battery status and system temperatures. The interface is highly customizable, featuring a theme engine for adjusting color schemes and a layout system to toggle specific resource bo

Ghostty is a cross-platform terminal emulator that utilizes GPU-accelerated rendering to provide high-performance text output and low-latency input. It functions as a unified terminal environment, maintaining consistent feature parity and configuration across different operating systems through a specialized windowing abstraction layer. The application is built on a declarative configuration engine that allows users to manage settings, keybindings, and visual themes using modular, plain-text files. It supports dynamic hot-reloading, enabling users to apply configuration changes in real-time w

React-admin is a framework for building data-driven administrative interfaces that connect to REST or GraphQL backends. It provides a comprehensive suite of tools for managing the full lifecycle of administrative applications, including resource-oriented routing, declarative form scaffolding, and context-driven state management. By utilizing a modular adapter-based architecture, the framework abstracts backend communication, allowing developers to build consistent CRUD interfaces that handle data fetching, authentication, and synchronization automatically. The project distinguishes itself thr

Gruvbox is a retro-inspired color scheme designed to provide a consistent visual experience across text editors, terminal emulators, and development environments. It focuses on improving readability and reducing eye strain by utilizing a high-contrast palette that remains stable across various software tools. The project distinguishes itself through a flexible rendering architecture that adapts to different technical environments. It supports high-fidelity twenty-four-bit color reproduction for modern terminals while maintaining compatibility with legacy systems through sixteen-color and two-

ImageToolbox is an open-source Android application designed for comprehensive image manipulation and batch processing. It provides a toolkit for performing advanced visual edits, including background removal, geometric transformations, and the application of complex filter chains to prepare image assets. The application distinguishes itself through a modular, pipeline-based architecture that allows for the integration of new processing algorithms as isolated plugins. It leverages native hardware acceleration to handle intensive pixel manipulation tasks and supports asynchronous execution to m

NativeScript is a cross-platform mobile development framework that enables the creation of native iOS and Android applications using JavaScript or TypeScript. It provides a direct bridge to native platform APIs, allowing developers to invoke native classes, methods, and properties directly from script code while maintaining full access to underlying mobile operating system features. The framework distinguishes itself through its direct native UI rendering, which maps declarative markup components to actual platform-native widgets rather than web-based views. This architecture is supported by

EverythingToolbar is a Windows productivity utility that integrates a file search interface directly into the system taskbar. It functions as a client for the Everything search engine, enabling rapid discovery of local files and folders through a dedicated, keyboard-driven launcher. The tool distinguishes itself by offering deep integration with the Windows shell, allowing users to trigger searches from any application using global hotkeys. Beyond simple file discovery, it supports automated workflows by mapping custom scripts and commands to specific file types or patterns, enabling tasks su

Cat-catch is a browser-based media utility designed to detect, capture, and manage web-based video and audio resources. It functions as a comprehensive sniffing and download management system, enabling users to identify hidden or protected media assets directly from active web pages. The tool specializes in reconstructing fragmented streaming protocols, such as DASH and M3U8, into complete files while providing options for real-time stream recording and playback control. The project distinguishes itself through its deep integration with local system environments and external automation tools.

gmail.js is a JavaScript library and development kit for building browser extensions that interact with the Gmail web interface. It provides a framework for automating communication workflows, extracting email metadata and content from active browser sessions, and injecting custom UI elements. The library distinguishes itself by enabling interaction with the Gmail interface through DOM manipulation and event interception without requiring external API authentication. It includes a toolkit for programmatically adding buttons, menus, and modal windows directly into the application layout. The

ChatGPT-Shortcut is a prompt engineering toolkit and management library designed to organize, refine, and deploy structured instructions for large language models. It functions as a browser-based prompt injector and a self-hosted prompt database, allowing users to maintain a curated collection of specialized templates. The project features a community prompt gallery where users can publish, discover, and vote on effective templates. It distinguishes itself by integrating these libraries directly into chat interfaces via userscripts or browser extensions, enabling access to prompts through sid

Automa is a browser-based automation platform that enables users to build, schedule, and execute repetitive web tasks through a visual, no-code interface. By operating as a browser extension, it provides a canvas-based environment where users construct workflows by connecting functional blocks to interact with web elements, manage browser state, and process data. The platform distinguishes itself through its deep integration with the browser environment, allowing for complex orchestration such as event-driven triggers, cross-origin request handling, and the ability to package workflows as sta

This repository serves as a comprehensive reference library for browser extension development, providing a collection of code samples and implementation patterns. It is designed to help developers understand the requirements for building extensions that adhere to current manifest standards, specifically focusing on the transition to and implementation of version three specifications. The project provides functional examples for core extension capabilities, including the use of event-driven background service workers, isolated content script injection, and message-passing for inter-process com

This project is a pre-configured development environment and boilerplate for building Chrome extensions using React and Webpack. It provides a structured project layout and a build system designed to bundle content scripts and background pages into a browser-ready manifest format. The toolkit emphasizes development speed and code quality through a hot reloading system that automatically refreshes the browser upon saving source files. It integrates TypeScript to provide static type definitions for browser extension APIs, ensuring type safety and intelligent code completion during development.

WXT is a development framework and build tool for creating browser extensions. It transforms source code into browser-compatible formats and provides a structured environment for managing the compilation and asset management of web extensions. The framework automates the definition of background and content scripts by mapping the file-system structure directly to extension manifests. It includes a development environment with hot module replacement to apply real-time code updates in the browser without manual restarts. The toolset covers the full extension lifecycle, including project bootst

This project is a Chromium-based web browser and multi-process browser shell. It utilizes a sandboxed architecture to isolate the rendering engine from the browser shell and manages web page rendering through GPU acceleration. The system includes a browser extension host and framework designed to execute third-party add-ons by managing their bindings, events, and feature sets. It also incorporates a web platform performance suite that uses synthetic microbenchmarks to measure the latency and throughput of low-level system primitives. The browser maintains security boundaries via filtered int

Vencord is a modification framework designed for the desktop and web versions of Discord. It functions as a client-side utility that enables users to extend the platform's native capabilities and modify its visual interface through the injection of custom scripts and stylesheets. The project utilizes a modular architecture that allows for the loading of isolated plugins, which hook into internal application events to introduce new tools and features. By intercepting internal message streams and function calls, the framework enables granular control over the application's behavior, while its s