Open source developer-tools projects
Every project in the registry tagged developer-tools, ranked by real GitHub adoption.
The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor
Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.
Turn any codebase, with its docs, SQL schemas, configs, and PDFs, into a queryable knowledge graph. A /graphify skill for Claude Code, Cursor, Codex, and Gemini
JavaScript API for Chrome and Firefox
Agent skill for beautiful, verifiable architecture, workflow, sequence, data-flow, and lifecycle diagrams—self-contained HTML with motion and crisp export.
Autonomous coding agents that complete real engineering tasks
CLI proxy that reduces LLM token consumption by 60-90% on common dev commands. Single Rust binary, zero dependencies
Sleek, intuitive API development and testing platform
A skill to stop your coding agent from burying the answer. ADHD-friendly output.
在 dsh 里装上这个插件即可,无需登录、注册或填 API Key,就能使用包括 DeepSeek V4.1 Flash、Kimi K3 在内的前沿模型——完全免费,不限量。 All you do is install this plugin in dsh: no login, no sign-up, no API k
High-performance code intelligence MCP server. Indexes codebases into a persistent knowledge graph — average repo in milliseconds. 158 languages, sub-ms queries
Lightweight, fast, and open-source API client for developers
the runtime your coding agents live on
A modern file manager that helps users organize their files and folders.
Streamlit — A faster way to build and share data apps.
💥 Blazing fast terminal file manager written in Rust, based on async I/O.
Model-agnostic platform for building intelligent AI agents
Open-source coding agent for your terminal, built in Rust and on a journey of continuous community improvement. Issues and PRs welcome.
Empower your team to build custom internal tools rapidly
Collection of handy online tools for developers, with great UX.
ShellCheck, a static analysis tool for shell scripts
API Documentation Browser
Lightning-fast and Powerful Code Editor written in Rust
Open-source coding agent for your IDE and terminal
DeepSeek-native AI coding agent for your terminal. Engineered around prefix-cache stability — leave it running.
Build data-rich React apps with ease and flexibility
AI-powered code completion for seamless development
A Swiss Army knife for developers.
Automated auditing, performance metrics, and best practices for the web.
Composio powers 1000+ toolkits, tool search, context management, authentication, and a sandboxed workbench to help you build AI agents that turn intent into act
📦 Repomix is a powerful tool that packs your entire repository into a single, AI-friendly file. Perfect for when you need to feed your codebase to Large Langua
Full-stack Python platform for web apps and internal tools
An open-source AI coding agent that lives in your terminal.
D2 is a modern diagram scripting language that turns text to diagrams.
A modified web browser that helps in responsive web development. A web developer's must have dev-tool.
The first open-source harness builder for AI coding. Make AI coding deterministic and repeatable.
Run coding agents from your phone, desktop, or terminal
Cross-platform terminal with AI built in
n³ The unorthodox terminal file manager
数字生命卡兹克开源的 AI Skills 合集 | Agent Skills: leader(帮你定义目标), neat-freak 洁癖, hv-analysis, khazix-writer & more — Claude Code, Codex & 40+ agents
AI agents that autonomously fix code and resolve GitHub issues
daily.dev is the personalized developer news feed and community. Get the best tech content from all over the web in your browser new tab or on mobile. Free and
Turns Data and AI algorithms into production-ready web applications in no time.
Visualize any GitHub codebase: free interactive architecture diagrams and one-minute explainer videos. Replace 'hub' with 'diagram' in any GitHub URL.
Universal provider proxy for OpenAI Codex & Claude Code — use any LLM (Claude, Gemini, Grok, DeepSeek, Ollama…) with Codex CLI, App, SDK, and Claude Code
Fast grammar checking that respects your privacy
Easy and Repeatable Kubernetes Development
Open source AI coding agent. Designed for large projects and real world tasks.
Run dozens of AI coding agents in parallel on your machine
Codespaces but open-source, client-only and unopinionated: Works with any IDE and lets you use any cloud, kubernetes or just localhost docker.
Graph-Native Infrastructure for Context and Accountable AI Systems
Run and supervise teams of coding agents from planning to merge. Any harness (Claude code, codex, +25 more). Desktop, web, mobile, and cloud agents.
Stackryze Domains: Free Domain for Everyone, Claim yours today.
🚀 Beautiful highly customizable statusline for Claude Code CLI with powerline support, themes, and more.
Offline documentation browser. Your personal reference library, searchable in an instant.
The modern API client that lives in your terminal.
Low-code platform allows you to build business apps, enables you to quickly create internal tools such as dashboard, crud app, admin panel, crm, cms, etc. Suppo
Generate production-quality SVG+PNG technical diagrams from natural language. 7 styles, UML support, and AI/Agent workflow patterns.
Continuous Profiling Platform. Debug performance issues down to a single line of code
Free, local tool to track AI coding token usage and cost across 37 tools and agents (Claude Code, Cursor, Codex, Gemini and more), by model, project, and task.
Related tags
Frequently asked questions
How many open source developer-tools projects are there?
This registry tracks 189 projects tagged developer-tools, with 2,952,022 GitHub stars between them. The most-adopted is ECC at 295,522 stars.
Are these developer-tools projects free to use?
Yes — 181 of the 189 carry an explicit open-source licence across 6 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which developer-tools project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these developer-tools projects still maintained?
170 of the 189 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.