Top COD GitHub Repositories & Tools (2026)

Microsoft Quantum Development Kit, including the Q# programming language, resource estimator, and Quantum Katas

A DeepSeek coding agent harness: persistent shell, Ultra subagents, auto approval, Chrome MCP and session telemetry

DevSkim is a set of IDE plugins, language analyzers, and rules that provide security "linting" capabilities.

Free up your Mac, safely. Clears the cache and junk it piles up on its own. Open source, and everything goes to the Trash, so nothing is ever lost.

Low-latency hardware-accelerated WebRTC video streaming and remote control for Raspberry Pi & NVIDIA Jetson

The next generation of tooling for Spring Boot, including support for Cloud Foundry manifest files, Concourse CI pipeline definitions, BOSH deployment manifests, and more... - Available for Visual Studio Code, Cursor, Eclipse, and Theia

A coupling library and ecosystem for partitioned multi-physics and multi-scale simulations, including surface and volume coupling.

JavaScript architecture diagrams and dependency graphs

Open-source design-method engine for Claude Code, Codex & Cursor. 23 agent skills for fixed design judgment, multiple grammars, semantic palettes, reference compilation, and evidence-verified UI. MIT.

PHP_Depend is an adaptation of the established Java development tool JDepend. This tool shows you the quality of your design in terms of extensibility, reusability and maintainability.

A tool which helps you diff xcodeproj files.

Power BI AI skills and Power BI agents for Claude Code and GitHub Copilot: a plugin marketplace of Power BI skills, subagents, and hooks for semantic models, DAX, TMDL, reports, and AI dashboards. Includes Microsoft Fabric skills and Fabric agents. Weekly updates.

Open-source, self-hosted AI app builder — an agent builds real apps in isolated sandboxes on your own server, each live at a preview URL. Self-host in one command. MIT.

HTML template formatter and linter for Django, Jinja, Twig, Nunjucks, Handlebars, Liquid, Go templates, Mustache, Tera, Askama and Angular. Formats markup and template syntax together, and lints for accessibility, correctness and style. CLI, pre-commit hook and VS Code extension.

A plugin marketplace for GitHub Copilot and other AI agents that provides Power Platform development plugins, including reusable skills, agents, and commands for building and deploying solutions.

Open-source desktop AI agent workspace with one-click Claude Code, Codex, OpenClaw, Hermes Agent setup and custom LLM model routing.

VS Code extension for Vitest

Batteries-included backend that works with any stack.

A modern, lambda-friendly, 120 character Java formatter.

'afm' command cli: macOS server and single prompt mode that exposes Apple's Foundation and MLX Models and other APIs running on your Mac through a single aggregated OpenAI-compatible API endpoint. Supports Apple Vision and single command (non-server) inference with piping as well . Now with Web Browser and local AI API aggregator