Open-source alternatives to Redshift

MonitorControl is a macOS display control utility and external monitor manager. It functions as a DDC/CI display controller that allows users to adjust the brightness and volume of third-party monitors using native Apple keyboard keys. The software mimics native macOS hardware feedback by implementing a system overlay tool that renders on-screen display indicators during adjustments. It further provides the ability to synchronize brightness levels across multiple screens or replicate ambient light sensor changes to external displays. The utility includes capabilities for mapping custom keybo

Hammerspoon is a programmable automation engine for macOS that enables deep system-level control through a Lua scripting environment. By bridging high-level scripts with native Objective-C APIs, it allows users to interact with the operating system's accessibility tree, intercept hardware input streams, and manage the lifecycle of running applications. The project distinguishes itself through an event-driven architecture that registers asynchronous hooks for system notifications and hardware events. This allows for real-time automation, such as remapping keyboard and mouse inputs, managing wi

WinDynamicDesktop is a Windows desktop wallpaper manager and time-based wallpaper scheduler. It functions as a customizable theme engine that automatically rotates background images throughout the day to match the current time. The tool is a scriptable desktop background utility, allowing the execution of external scripts to add custom logic to the rotation behavior. It supports the import of custom theme files and compressed archives to manage community-created visual sets. The application covers the management of a theme library, including the ability to create, organize, and remove custom

This project is a library of algorithms for transforming, filtering, and combining asynchronous data streams in Swift. It provides a toolkit for managing asynchronous sequences, offering a concurrent sequence processor to merge, zip, and concatenate multiple streams into single outputs. The library distinguishes itself through specialized timing and flow control mechanisms. It implements asynchronous back-pressure to synchronize producer and consumer speeds and provides a toolkit for event timing, including debouncing, throttling, and the generation of periodic timers. The capability surface

Everforest is a nature-inspired color scheme and syntax highlighting theme for Vim and Neovim. It provides a collection of light and dark color schemes designed with soft contrast to reduce eye strain. The theme features a green-based palette with adjustable background contrast and multi-variant color profiles to suit different ambient lighting. Users can modify the visual appearance through variable-driven customization and a configurable color palette. The project covers semantic syntax highlighting and UI element colorization to distinguish code logic across various programming languages.

Twinkle Tray is a Windows display manager and DDC/CI monitor control utility designed to manage hardware settings across internal and external displays. It functions as a system tray application that allows for the adjustment of brightness, contrast, and volume on multiple monitors. The project provides multi-display brightness normalization to balance backlight levels across different hardware profiles for a consistent visual experience. It also includes an automatic brightness scheduler that modifies luminosity based on the time of day or system idle states. Beyond the user interface, the

BetterDisplay is a comprehensive display management utility and virtual display engine designed to provide granular control over monitor configurations. It functions as a low-level hardware controller that interacts directly with graphics drivers and system APIs to override manufacturer limitations, enabling users to manage resolution, scaling, brightness, and color profiles across complex multi-monitor setups. The project distinguishes itself through its ability to generate synthetic virtual displays and inject custom framebuffers into the graphics pipeline, allowing for arbitrary resolution

Input Remapper is a Linux tool that reassigns physical keys, buttons, and axes on keyboards, mice, and gamepads to custom actions or keypresses. It intercepts raw input events at the kernel level and injects remapped events through synthetic devices, enabling real-time customization without modifying system-wide settings. The tool supports modifier-aware key combination mapping, allowing complex shortcuts that preserve modifier timing. It also provides gamepad-to-keyboard mapping, mouse button reconfiguration, keyboard layout enhancement, and accessibility input customizations. A daemon-clien

Solaar is a device management tool and configuration suite for Logitech wireless peripherals on Linux. It serves as an input peripheral monitor that tracks battery levels and connection link quality via a system tray application, while providing a receiver manager for pairing and unpairing wireless devices with proprietary USB receivers. The project features an input device automation engine that maps hardware events and mouse gestures to simulated keyboard inputs or system commands. This allows for the creation of custom rules that trigger actions based on device notifications or specific wi

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

Overtone is a Lisp audio synthesis library that provides a programmable environment for designing synthesizers and generating real-time audio. It serves as a digital signal processing framework for live sound programming, integrating an audio sample manager for retrieving and caching sounds from remote repositories and a musical sequence generator for composing melodic and rhythmic structures. The project distinguishes itself through its specialized interfaces for hardware and networking, featuring a dedicated system for routing MIDI data and exchanging Open Sound Control messages between sof

This project is a visual customization theme for the Visual Studio Code editor, designed to improve code readability and developer comfort. It provides a collection of high-contrast color schemes and aesthetic configurations that adjust the appearance of the editor interface and syntax highlighting to support extended coding sessions. The theme focuses on reducing visual fatigue by optimizing color palettes and contrast levels for both low-light and high-brightness environments. It includes specific workbench overrides that define clear visual boundaries between the editor and sidebar areas,

Piper is a GTK desktop application and client interface designed to manage gaming peripheral hardware settings. It serves as a visual tool for configuring mice and keyboards by communicating with the libratbag background daemon. The application provides a graphical interface to adjust hardware-level settings without the use of proprietary vendor software. This includes a dedicated configuration UI for gaming mice to manage DPI and other device-specific parameters. The tool covers several hardware customization areas, including RGB lighting patterns, mouse button remapping, and cursor sensiti

This project is a business rules and complex event processing engine designed to manage logical decision-making and stateful workflows. It functions as a computational framework that evaluates incoming data streams and facts against conditional logic to derive new conclusions and trigger automated actions. The engine distinguishes itself through a combination of forward-chaining inference and deterministic state machine orchestration. It uses salience-based conflict resolution to prioritize rule execution and supports persistent contextual state tracking to manage long-running business proces

RxPY is a functional reactive programming library and a ReactiveX observable library for Python. It serves as an asynchronous stream processor and event-driven coordination framework used to build data pipelines that react to changes in state or streams of events over time. The library provides a toolkit for composing asynchronous and event-based programs using observable sequences and operators. It distinguishes itself through the use of configurable schedulers to manage concurrency, timing, and subscription lifecycles. The project covers a wide range of stream processing capabilities, incl

serverless-offline is a Serverless Framework plugin that provides a local cloud infrastructure simulator. It acts as an AWS Lambda local emulator and AWS API Gateway mock, allowing for the development and testing of serverless functions on a local machine without deploying to a remote provider. The project distinguishes itself by simulating bidirectional WebSocket connections and message routing, as well as mimicking the request lifecycle of an HTTP gateway. It includes a mock identity authorizer pipeline to verify tokens and JWTs locally and supports the mounting of virtual dependency layers

AmplitudeJS is a JavaScript library and framework for building custom HTML5 audio players. It serves as a client-side playlist manager and media controller that bridges the gap between HTML elements and the Web Audio API, allowing developers to create branded media interfaces without relying on default browser styles. The project is distinguished by its use of CSS-class-based DOM binding and data-attribute state mapping, which links HTML elements directly to playback controls and track metadata. It includes a dedicated visualization system that uses the Web Audio API to render real-time SVG w

Curio is a Python library for structured concurrency and asynchronous network programming. It serves as a framework for handling thousands of simultaneous TCP connections using non-blocking sockets and high-throughput I/O. The library organizes asynchronous operations into a hierarchy of parent and child coroutines to ensure reliable termination and cleanup of dependent tasks. It provides a toolkit for coordinating these concurrent operations through the use of task groups and timeouts. The framework covers a broad range of concurrency management capabilities, including inter-task communicat

Bacon.js is a JavaScript functional reactive programming library used for coordinating complex asynchronous data flows. It functions as an observable event stream framework and an asynchronous data flow orchestrator, allowing developers to model events as declarative streams and properties. The library distinguishes itself through its ability to manage reactive state and synchronize timing across multiple sources. It provides specialized mechanisms for atomic state synchronization to prevent glitches in derived properties and offers advanced coordination strategies such as asynchronous stream

Flow-dashboard is a centralized personal productivity and knowledge management platform designed to track habits, manage tasks, and aggregate data from disparate sources. It functions as a personal analytics engine that stores records in a relational database, allowing users to visualize behavioral patterns and progress toward long-term goals through detailed charts and reports. The system distinguishes itself through a conversational interface that enables users to interact with their data using natural language commands. By integrating with external services, it synchronizes activity logs,

Tasmota is a universal firmware platform for ESP8266 and ESP32 microcontrollers, designed to provide local control and management of smart home hardware. It functions as an event-driven automation controller that replaces proprietary factory firmware, allowing users to manage relays, sensors, and lighting systems without relying on external cloud services. The system is built on a modular driver architecture that enables dynamic hardware configuration and peripheral support through a web-based management interface. The platform distinguishes itself through a template-driven hardware mapping s

swww is an animated wallpaper engine and daemon for Wayland compositors. It functions as a shared-memory wallpaper manager that renders image frames and transitions to create moving desktop backgrounds. The project enables dynamic wallpaper management across multiple monitors in real time, allowing users to update backgrounds or set solid colors without restarting the background process. It supports automated background rotation and smooth visual transitions, such as wipes and fades, when switching between images.

CodexMonitor is an AI agent orchestration interface designed for monitoring agentic workflows and managing remote daemon connections. It provides a web-based dashboard for coordinating AI agents across local workspaces and managing the execution of large language model tasks. The system distinguishes itself by integrating AI agents directly into git-based development workflows, synchronizing GitHub issues and pull requests with conversation threads. It uses branch worktree isolation to run tasks in separate physical directory copies, preventing state leakage between concurrent agent activitie

FastLED is a C++ library for driving pixel-addressable LED chipsets and strips across various microcontroller platforms. It functions as an addressable LED control library and driver abstraction layer that converts color data into specific electrical timing for different hardware protocols. The project includes an audio-reactive visual engine for translating real-time beats and frequency data into synchronized animations, alongside a microcontroller math library optimized for high frame rates. The system provides a unified interface for managing various clockless and SPI LED chipsets. It dist

AndroidUtilCode is an Android utility library and system API wrapper designed to reduce development boilerplate. It provides a collection of helper classes for common tasks including system settings management, file I/O, and hardware access. The project distinguishes itself through a comprehensive toolset for device management and UI assistance. It includes specialized capabilities for monitoring battery status, managing system volume and brightness, and implementing UI helpers to prevent duplicate click events. It also provides a dedicated system for coordinate conversion between different m

chroma.js is a JavaScript library for color manipulation, space conversion, and the generation of data visualization color scales. It provides a system for transforming colors between formats including RGB, HSL, Lab, LCH, OKLab, and CMYK, alongside tools for parsing and modifying colors across these spaces. The library specializes in data-driven color mapping, using algorithms such as Cubehelix, Bezier interpolation, and ColorBrewer palettes to translate numeric data into visual gradients. It includes a perceptual color difference calculator that utilizes CIE 2000 Delta E and Euclidean metric

Entity-level git merge driver. Resolves false conflicts git invents when independent agents edit the same file. ~95% reduction vs. line-based merge.