Windows 10 GitHub Repositories (2026) · Open Source Tools

Open-source Windows and Office activator featuring HWID, Ohook, TSforge, and Online KMS activation methods, along with advanced troubleshooting.

Free and open-source software that allows users to set animated desktop wallpapers and screensavers powered by WinUI 3.

A modern file manager that helps users organize their files and folders.

Safely change Windows 11 / 10 system fonts everywhere including all modern apps and third party apps

UniGetUI: The Graphical Interface for your package managers. Could be terribly described as a package manager manager to manage your package managers

Convert, Compress, Resize, and more in Windows Explorer.

Port of macOS Mojave Dynamic Desktop feature to Windows

Open source tool to safely clean orphaned Windows Installer files and reclaim disk space

WinUI: a modern UI framework with a rich set of controls and styles to build dynamic and high-performing Windows applications.

Windows Calculator: A simple yet powerful calculator that ships with Windows

Portable Tool for an Ideal Windows Setup

The Windows debloater.

The Windows App SDK empowers all Windows desktop apps with modern Windows UI, APIs, and platform features, including back-compat support, shipped via NuGet.

Kiwix JS Offline Browser implemented as a Progressive Web App (PWA), and packaged as Electron, NWJS and UWP apps for Windows, Linux and macOS..

🎮 · Jazz² Resurrection: Native C++ reimplementation of Jazz Jackrabbit 2

Microsoft PowerToys is a collection of utilities that supercharge productivity and customization on Windows

The finest Windows Optimizer

Easily manage the brightness of your monitors in Windows from the system tray

:zap: The most powerful open source tweaker on GitHub for fine-tuning Windows 10 & Windows 11

A small, yet powerful framework, designed for building applications across all XAML platforms. Its strong support for MV* patterns will enable you to build your solution quickly, without the need to sacrifice code quality or testability.