Open Source Windows Tools
Windows is a widely used desktop operating system for running applications, managing files, connecting devices, and working across personal and business environments. Tools built for Windows can extend or customize the desktop, automate routine tasks, improve security, support remote access, and help users manage media and other content. They range from small utilities to applications that interact closely with system settings and services.
Open source Windows software includes desktop applications, command-line utilities, customization tools, automation frameworks, and security software. When choosing a tool, check which Windows versions it supports, its installation and hardware requirements, license terms, maintenance activity, and compatibility with your existing setup. Consider how it handles updates and permissions, especially when it changes system behavior. These tools can be useful for home users, administrators, developers, and organizations seeking greater control or transparency.
21 repositories · updated October 3, 2026
Installer: Make Windows 11 More Consistent
Rectify11 Installer applies system-file modifications and other changes intended to make Windows 11 more visually consistent. The repository describes the V3 installer, but advises against using it because V4 is a complete rewrite.
pear-desktop: Use YouTube Music as a Desktop App
Pear Desktop wraps YouTube Music in a cross-platform desktop application with a native look and feel. It suits listeners who want a dedicated player and developers who want to extend it with plugins and themes.
MCP Server Excel: AI-Powered Excel Automation via COM API
MCP Server Excel is a powerful tool enabling AI assistants like GitHub Copilot and Claude to automate Microsoft Excel through natural language. It leverages the actual Excel COM API, offering 26 specialized tools and 234 operations for comprehensive automation, from Power Query to VBA macros. This project is ideal for data analysts, developers, and business users seeking to streamline complex Excel workflows with AI.
Recordly: Create Polished Demo Videos with Ease on Mac, Windows, and Linux
Recordly is an open-source screen recorder and editor designed for creating professional demo videos, walkthroughs, and product videos without requiring advanced editing skills. It offers powerful features like auto-zooms, cursor polish, webcam overlays, and a comprehensive timeline editor, making it accessible across macOS, Windows, and Linux. This tool streamlines the video creation process, allowing users to produce high-quality content efficiently.
PYAS: Python & C++ Antivirus with ML and Behavioral Monitoring
PYAS is an advanced antivirus software developed using a hybrid approach of Python and C++. It leverages machine learning and behavioral monitoring to effectively detect and block various threats. This project offers comprehensive security for Windows systems, combining user-mode scanning with kernel-mode protection.
xtool: Cross-Platform Xcode Replacement for iOS Development
xtool is an innovative cross-platform tool designed to replace Xcode, enabling developers to build and deploy iOS applications using SwiftPM on Linux, Windows, and macOS. It streamlines the iOS development workflow by offering functionalities like building SwiftPM packages into apps, signing, installation, and programmatic interaction with Apple Developer Services.
Numi: A Natural Language Calculator for macOS, Linux, and Windows
Numi is an elegant calculator application available for macOS, Linux, and Windows, designed to interpret natural language input for calculations. It allows users to express complex tasks like "$20 in euro - 5% discount" or "today + 2 weeks" and instantly receive answers. This open-source project, built with JavaScript, simplifies everyday computations with its intuitive interface and powerful features.
Noi: Streamlining AI Interactions and Workflow Management
Noi is a powerful desktop application designed to bring order to your digital workflow, especially when interacting with AI tools. It offers a unique interaction-first approach, multi-window management, and robust session isolation to enhance productivity. With features like local-first data storage and comprehensive prompt management, Noi helps users achieve a more focused and efficient browsing experience.
UFO: Microsoft's Multi-Device AI Agent Orchestration Framework
Microsoft's UFO project introduces a powerful framework for intelligent automation, evolving from a robust Windows Desktop AgentOS (UFO²) to a revolutionary Multi-Device Agent Galaxy (UFO³). This project enables the orchestration of AI agents across diverse platforms, streamlining complex workflows and enhancing digital interaction. It offers both standalone Windows automation and a scalable solution for cross-device collaboration.
p2p: Portable P2P Remote Desktop with No Configuration
The p2p repository offers a portable remote desktop solution that requires no configuration or installation. Built on a P2P architecture, it enables users to establish direct connections for remote control and chat functionalities. This tool is designed for ease of use, making remote assistance accessible and straightforward.
F2: A Powerful Command-Line Tool for Batch Renaming Files and Directories
F2 is a cross-platform command-line tool for batch renaming files and directories. Written in Go, it offers a safe and efficient way to manage file names with features like dry run, variable support, and undo functionality. This makes it an invaluable utility for developers and power users alike.
MD3-Windows: Material You Widgets for Your Windows Desktop
MD3-Windows is a Rainmeter skin designed to bring Google's Material You aesthetic to your Windows desktop. It offers a collection of dynamic widgets that seamlessly adapt their colors to your wallpaper, supporting both light and dark modes. This project allows for extensive customization, providing a modern and cohesive look inspired by stock Android 12+.