Open source developer-tools projects

Every project in the registry tagged developer-tools, ranked by real GitHub adoption.

projects 189 combined stars ★ 3.0M refresh nightly
01 ECC ★ 296K

The agent harness performance optimization system. Skills, instincts, memory, security, and research-first development for Claude Code, Codex, Opencode, Cursor

last push19 hours ago languageJavaScript licenseMIT
02 ponytail ★ 183K

Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.

last push5 days ago languageJavaScript licenseMIT
03 graphify ★ 141K

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

last push5 hours ago languagePython licenseApache-2.0
04 puppeteer ★ 96K

JavaScript API for Chrome and Firefox

last push6 hours ago languageTypeScript licenseApache-2.0
05 archify ★ 93K

Agent skill for beautiful, verifiable architecture, workflow, sequence, data-flow, and lifecycle diagrams—self-contained HTML with motion and crisp export.

last push8 hours ago languageJavaScript licenseApache-2.0
06 OpenHands ★ 93K

Autonomous coding agents that complete real engineering tasks

last push5 hours ago languageTypeScript licenseMIT
07 rtk ★ 85K

CLI proxy that reduces LLM token consumption by 60-90% on common dev commands. Single Rust binary, zero dependencies

last push10 hours ago languageRust licenseApache-2.0
08 Hoppscotch ★ 81K

Sleek, intuitive API development and testing platform

last push3 days ago languageTypeScript licenseMIT
09 i-have-adhd ★ 60K

A skill to stop your coding agent from burying the answer. ADHD-friendly output.

last push14 days ago languagePython licenseMIT
10 dsh-our-free-model ★ 57K

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

last push16 hours ago languageJavaScript licenseMIT
11 codebase-memory-mcp ★ 48K

High-performance code intelligence MCP server. Indexes codebases into a persistent knowledge graph — average repo in milliseconds. 158 languages, sub-ms queries

last push7 hours ago languageC licenseMIT
12 Bruno ★ 48K

Lightweight, fast, and open-source API client for developers

last push7 hours ago languageJavaScript licenseMIT
13 herdr ★ 48K

the runtime your coding agents live on

last push10 hours ago languageRust licenseApache-2.0
14 Files ★ 46K

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

last push8 hours ago languageC# licenseMIT
15 streamlit ★ 46K

Streamlit — A faster way to build and share data apps.

last push4 hours ago languagePython licenseApache-2.0
16 yazi ★ 43K

💥 Blazing fast terminal file manager written in Rust, based on async I/O.

last push11 hours ago languageRust licenseMIT
17 Agno ★ 43K

Model-agnostic platform for building intelligent AI agents

last push4 hours ago languagePython licenseApache-2.0
18 Codewhale ★ 41K

Open-source coding agent for your terminal, built in Rust and on a journey of continuous community improvement. Issues and PRs welcome.

last push5 hours ago languageRust licenseMIT
19 AppSmith ★ 41K

Empower your team to build custom internal tools rapidly

last push10 hours ago languageTypeScript licenseApache-2.0
20 it-tools ★ 41K

Collection of handy online tools for developers, with great UX.

last push6 days ago languageVue licenseGPL-3.0
21 shellcheck ★ 40K

ShellCheck, a static analysis tool for shell scripts

last push8 days ago languageHaskell licenseGPL-3.0
22 devdocs ★ 40K

API Documentation Browser

last push15 hours ago languageRuby licenseMPL-2.0
23 lapce ★ 39K

Lightning-fast and Powerful Code Editor written in Rust

last push25 days ago languageRust licenseApache-2.0
24 Continue ★ 36K

Open-source coding agent for your IDE and terminal

last push12 hours ago languageTypeScript licenseApache-2.0
25 DeepSeek-Reasonix ★ 36K

DeepSeek-native AI coding agent for your terminal. Engineered around prefix-cache stability — leave it running.

last push7 hours ago languageGo licenseMIT
26 Refine ★ 36K

Build data-rich React apps with ease and flexibility

last push2 months ago languageTypeScript licenseMIT
27 Tabby ★ 34K

AI-powered code completion for seamless development

last push4 months ago languageRust license—
28 DevToys ★ 32K

A Swiss Army knife for developers.

last push1 months ago languageC# licenseMIT
29 lighthouse ★ 31K

Automated auditing, performance metrics, and best practices for the web.

last push28 hours ago languageJavaScript licenseApache-2.0
30 composio ★ 31K

Composio powers 1000+ toolkits, tool search, context management, authentication, and a sandboxed workbench to help you build AI agents that turn intent into act

last push4 hours ago languageTypeScript licenseMIT
31 repomix ★ 29K

📦 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

last push32 hours ago languageTypeScript licenseMIT
32 Reflex ★ 29K

Full-stack Python platform for web apps and internal tools

last push6 hours ago languagePython licenseApache-2.0
33 qwen-code ★ 29K

An open-source AI coding agent that lives in your terminal.

last push5 hours ago languageTypeScript licenseApache-2.0
34 d2 ★ 26K

D2 is a modern diagram scripting language that turns text to diagrams.

last push22 days ago languageGo licenseMPL-2.0
35 responsively-app ★ 26K

A modified web browser that helps in responsive web development. A web developer's must have dev-tool.

last push1 months ago languageTypeScript licenseAGPL-3.0
36 Archon ★ 24K

The first open-source harness builder for AI coding. Make AI coding deterministic and repeatable.

last push6 hours ago languageTypeScript licenseMIT
37 Paseo ★ 23K

Run coding agents from your phone, desktop, or terminal

last push5 hours ago languageTypeScript license—
38 WaveTerm ★ 23K

Cross-platform terminal with AI built in

last push13 hours ago languageGo licenseApache-2.0
39 nnn ★ 22K

n³ The unorthodox terminal file manager

last push34 hours ago languageC licenseBSD-2-Clause
40 khazix-skills ★ 22K

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

last push1 months ago languagePython licenseMIT
41 SWE-agent ★ 21K

AI agents that autonomously fix code and resolve GitHub issues

last push7 days ago languagePython licenseMIT
42 daily ★ 20K

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

last push11 hours ago languageJavaScript licenseAGPL-3.0
43 taipy ★ 19K

Turns Data and AI algorithms into production-ready web applications in no time.

last push3 months ago languagePython licenseApache-2.0
44 gitdiagram ★ 19K

Visualize any GitHub codebase: free interactive architecture diagrams and one-minute explainer videos. Replace 'hub' with 'diagram' in any GitHub URL.

last push4 days ago languageTypeScript licenseMIT
45 opencodex ★ 18K

Universal provider proxy for OpenAI Codex & Claude Code — use any LLM (Claude, Gemini, Grok, DeepSeek, Ollama…) with Codex CLI, App, SDK, and Claude Code

last push4 hours ago languageTypeScript licenseMIT
46 Harper ★ 17K

Fast grammar checking that respects your privacy

last push4 hours ago languageRust licenseApache-2.0
47 skaffold ★ 16K

Easy and Repeatable Kubernetes Development

last push9 hours ago languageGo licenseApache-2.0
48 plandex ★ 16K

Open source AI coding agent. Designed for large projects and real world tasks.

last push13 months ago languageGo licenseMIT
49 Superset ★ 16K

Run dozens of AI coding agents in parallel on your machine

last push4 hours ago languageTypeScript license—
50 devpod ★ 15K

Codespaces but open-source, client-only and unopinionated: Works with any IDE and lets you use any cloud, kubernetes or just localhost docker.

last push12 months ago languageGo licenseMPL-2.0
51 semantica ★ 14K

Graph-Native Infrastructure for Context and Accountable AI Systems

last push12 hours ago languagePython licenseMIT
52 agent-orchestrator ★ 14K

Run and supervise teams of coding agents from planning to merge. Any harness (Claude code, codex, +25 more). Desktop, web, mobile, and cloud agents.

last push4 hours ago languageGo licenseApache-2.0
53 FreeDomains ★ 14K

Stackryze Domains: Free Domain for Everyone, Claim yours today.

last push4 days ago languageJavaScript licenseAGPL-3.0
54 ccstatusline ★ 13K

🚀 Beautiful highly customizable statusline for Claude Code CLI with powerline support, themes, and more.

last push15 hours ago languageTypeScript licenseMIT
55 zeal ★ 13K

Offline documentation browser. Your personal reference library, searchable in an instant.

last push2 days ago languageC++ licenseGPL-3.0
56 posting ★ 13K

The modern API client that lives in your terminal.

last push18 days ago languageGo licenseApache-2.0
57 illa-builder ★ 12K

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

last push5 months ago languageTypeScript licenseApache-2.0
58 fireworks-tech-graph ★ 12K

Generate production-quality SVG+PNG technical diagrams from natural language. 7 styles, UML support, and AI/Agent workflow patterns.

last push13 days ago languagePython licenseMIT
59 pyroscope ★ 12K

Continuous Profiling Platform. Debug performance issues down to a single line of code

last push6 hours ago languageGo licenseAGPL-3.0
60 codeburn ★ 12K

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.

last push5 hours ago languageTypeScript licenseMIT

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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.