Top CODE GitHub Repositories & Tools (2026)

Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust.

Structural overview of a repository: every non-ignored file as a read-only panel on a zoomable canvas

Checkstyle is a development tool to help programmers write Java code that adheres to a coding standard. By default it supports the Google Java Style Guide and Sun Code Conventions, but is highly configurable. It can be invoked with an ANT task and a command line program.

Go security checker

Unified Policy as Code

AI enabled pair programmer for Claude, GPT, O Series, Grok, Deepseek, Gemini and 300+ models

Gentle-AI configures the AI coding agents you already use: Claude Code, Cursor, OpenCode, Codex, Pi, and more. Choose persistent memory, Organic-Driven Development, curated skills, MCP servers, personas, and optional bounded review. Open source, no agent lock-in.

GoCD - Continuous Delivery server main repository

Codex-native engineering workflows derived from pstack, with 45 explicit skills and 23 Poteto Mode playbooks.

The Enterprise-Grade Multi-Agent Orchestration Framework. Website: https://swarms.ai

Format Rust code

Production Grade Cloud-Ready .NET 10 Starter Kit (Web API + React Client) with Multitenancy Support, and Clean/Modular Architecture that saves roughly 200+ Development Hours! All Batteries Included.

Find and fix problems in your JavaScript code.

A free coding agent in your terminal. It runs on the smartest free model that is up today.

⚗️ Adds code analysis to Laravel improving developer productivity and code quality.

Agent OS: the agent gets smarter on its own. We just hold the line: Interview-gated, staged evaluation, budgeted evolution loop. MCP server, 14 runtimes: Claude Code, Codex CLI, Gemini CLI, OpenCode, Copilot, Kiro and more.

The world's first open-source AI-native vector design tool and the first to feature concurrent Agent Teams. Design-as-Code. Turn prompts into UI directly on the live canvas. A modern alternative to Pencil.

Open Source PHP Framework (originally from EllisLab)

Quick and Easy server testing/validation

It's not just a linter that annoys you!