Top WINDOWS GitHub Repositories & Tools (2026)

Official source code of FreeCAD, a free and opensource multiplatform 3D parametric modeler.

A visual multi-agent desktop for Codex: live tasks, shared projects, isolated Missions, and OpenCodex models on Windows.

A Windows share target for bringing WeChat chat archives to ChatGPT.

🌐 The open-source Agentic browser; alternative to ChatGPT Atlas, Perplexity Comet, Dia.

Create beautiful applications using Go

ZapFast: a fast, native WhatsApp client in Rust and egui

Free and open-source PDF editor for Windows with a built-in PDF 2.0 engine. View, annotate, OCR, merge, split, crop, rotate, compare, edit text, draw, sign, fill forms, print, flatten, and open password-protected PDFs without a subscription.

A cross-platform, OpenGL terminal emulator.

Cross-platform local MCP capabilities for ChatGPT with Chrome integration, Goal, Compact & Resume, and durable multi-agent workflows.

awesome game security [Welcome to PR]

winapp, the Windows App Development CLI, is a single command-line interface for managing Windows SDKs, packaging, generating app identity, manifests, certificates, and using build tools with any app framework.

The Fully Customizable Desktop Environment for Windows 10/11.

A modern, high-performance local file search and productivity tool for Windows. A sleek, customizable alternative to Everything and Listary built with C# WPF and NT Services, featuring instant NTFS MFT parsing, real-time USN monitoring, and plugin support.

A simple zero-config tool to make locally trusted development certificates with any names you'd like.

The open-source macro pad with customizable widgets, powerful integrations and a secure plugin ecosystem.

Comfortably monitor your network traffic 🕵️‍♂️

PowerShell for every system!

mouse & keyboard sharing via LAN

Desktop app to download audio/video from hundreds of sites

Puts DLSS 5 neural rendering into games that never shipped it, and brings the game's own DLSS up to date - super resolution, ray reconstruction, frame generation. Scans your library, picks one of eight routes, fetches every part from its publisher at run time, then says what happened. One exe, no admin; uninstall puts the game back.