Open source developer-tools projects

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

projects 69 combined stars ★ 1.2M refresh nightly
01 ponytail ★ 141K

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

last push3 days ago languageJavaScript licenseMIT
02 graphify ★ 119K

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 push29 hours ago languagePython licenseApache-2.0
03 OpenHands ★ 88K

Autonomous coding agents that complete real engineering tasks

last push5 hours ago languageTypeScript licenseMIT
04 Hoppscotch ★ 80K

Sleek, intuitive API development and testing platform

last push33 hours ago languageTypeScript licenseMIT
05 Bruno ★ 47K

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

last push12 hours ago languageJavaScript licenseMIT
06 Agno ★ 42K

Model-agnostic platform for building intelligent AI agents

last push7 hours ago languagePython licenseApache-2.0
07 AppSmith ★ 41K

Empower your team to build custom internal tools rapidly

last push5 hours ago languageTypeScript licenseApache-2.0
08 devdocs ★ 39K

API Documentation Browser

last push2 days ago languageRuby licenseMPL-2.0
09 Continue ★ 36K

Open-source coding agent for your IDE and terminal

last push36 hours ago languageTypeScript licenseApache-2.0
10 Refine ★ 36K

Build data-rich React apps with ease and flexibility

last push7 days ago languageTypeScript licenseMIT
11 DeepSeek-Reasonix ★ 36K

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

last push6 hours ago languageGo licenseMIT
12 Tabby ★ 34K

AI-powered code completion for seamless development

last push3 months ago languageRust license
13 lighthouse ★ 31K

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

last push5 hours ago languageJavaScript licenseApache-2.0
14 Reflex ★ 29K

Full-stack Python platform for web apps and internal tools

last push5 hours ago languagePython licenseApache-2.0
15 repomix ★ 28K

📦 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 push5 days ago languageTypeScript licenseMIT
16 qwen-code ★ 28K

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

last push5 hours ago languageTypeScript licenseApache-2.0
17 Archon ★ 23K

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

last push15 hours ago languageTypeScript licenseMIT
18 WaveTerm ★ 22K

Cross-platform terminal with AI built in

last push8 days ago languageGo licenseApache-2.0
19 SWE-agent ★ 20K

AI agents that autonomously fix code and resolve GitHub issues

last push3 days ago languagePython licenseMIT
20 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 push4 days ago languageJavaScript licenseAGPL-3.0
21 taipy ★ 19K

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

last push1 months ago languagePython licenseApache-2.0
22 Paseo ★ 18K

Run coding agents from your phone, desktop, or terminal

last push5 hours ago languageTypeScript license
23 Harper ★ 15K

Fast grammar checking that respects your privacy

last push7 hours ago languageRust licenseApache-2.0
24 Superset ★ 14K

Run dozens of AI coding agents in parallel on your machine

last push9 hours ago languageTypeScript license
25 zeal ★ 13K

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

last push8 days ago languageC++ licenseGPL-3.0
26 pyroscope ★ 12K

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

last push5 hours ago languageGo licenseAGPL-3.0
27 codeburn ★ 11K

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 push10 hours ago languageTypeScript licenseMIT
28 Omnigent ★ 10K

Common layer for composing and governing AI agents

last push5 hours ago languagePython licenseApache-2.0
29 karate ★ 9.0K

Test Automation Made Simple

last push18 hours ago languageJava licenseMIT
30 xh ★ 8.1K

Friendly and fast tool for sending HTTP requests

last push13 days ago languageRust licenseMIT
31 DeepAudit ★ 7.0K

DeepAudit:人人拥有的 AI 黑客战队,让漏洞挖掘触手可及。国内首个开源的代码漏洞挖掘多智能体系统。小白一键部署运行,自主协作审计 + 自动化沙箱 PoC 验证。支持 Ollama 私有部署 ,一键生成报告。支持中转站。​让安全不再昂贵,让审计不再复杂。

last push40 hours ago languagePython licenseAGPL-3.0
32 Requestly ★ 6.8K

Intercept, modify, and debug HTTP(S) requests effortlessly

last push14 hours ago language license
33 FalkorDB ★ 6.2K

Graph database built for GraphRAG and multi-tenant AI apps

last push12 hours ago languageRust license
34 hey-api ★ 5.4K

👨‍🚀 Turn API specifications into production-ready SDKs, validators, mocks, and more. 20+ plugins. Millions of weekly npm downloads. Used by Vercel, OpenCode,

last push24 days ago languageTypeScript licenseMIT
35 code-graph-rag ★ 5.1K

The ultimate RAG for your monorepo. Query, understand, and edit multi-language codebases with the power of AI and knowledge graphs

last push26 hours ago languagePython licenseMIT
36 ACI.dev ★ 4.9K

Build reliable AI agents with unified tool integration

last push4 months ago languagePython licenseApache-2.0
37 Wakapi ★ 4.4K

Track coding time effortlessly, gain insights instantly

last push3 days ago languageGo licenseMIT
38 kubero ★ 4.4K

A free and self-hosted PaaS alternative to Heroku / Netlify / Coolify / Vercel / Dokku / Portainer running on Kubernetes

last push8 days ago languageTypeScript licenseGPL-3.0
39 HTTPie ★ 4.0K

Modern command-line HTTP client for the API era

last push1.5 years ago language license
40 curlie ★ 3.7K

The power of curl, the ease of use of httpie.

last push9 months ago languageGo licenseMIT
41 Vibe-Skills ★ 3.3K

Intelligent Skill routing and workflow orchestration for AI agents — +21.12 pp reward, −29.6% tokens on SkillsBench with DeepSeekV4Flash-VE.

last push17 days ago languagePython licenseApache-2.0
42 Laminar ★ 3.3K

AI-powered platform for engineering LLM products

last push7 hours ago languageTypeScript licenseApache-2.0
43 apidash ★ 2.9K

API Dash is a beautiful AI-powered open-source cross-platform (Desktop & Mobile) API Client built using Flutter which can help you easily create & customize you

last push3 days ago languageDart licenseApache-2.0
44 sponge ★ 2.9K

A powerful and easy-to-use Go development framework that enables you to effortlessly build stable, reliable, and high-performance backend services with a "low-c

last push9 months ago languageGo licenseMIT
45 Restfox ★ 2.8K

Offline-First Minimalistic HTTP & Socket Testing Client for the Web & Desktop

last push3 months ago languageVue licenseMIT
46 envd ★ 2.2K

🏕️ Reproducible development environment for humans and agents

last push2 months ago languageGo licenseApache-2.0
47 kubewall ★ 1.9K

kubewall - Kubernetes Dashboard for Multi-Cluster Management Real-Time, Self-Hosted, Single Binary, AI-powered. Manage, monitor & debug K8s clusters in your bro

last push5 days ago languageTypeScript licenseApache-2.0
48 GoNavi ★ 1.9K

High-performance multi-data-source database client — ~30MB, AI & MCP ready, zero Electron bloat. | 高性能多数据源数据库客户端:约 30MB,AI 与 MCP 就绪,告别 Electron 膨胀。

last push15 hours ago languageTypeScript licenseApache-2.0
49 pythagora ★ 1.8K

Generate automated tests for your Node.js app via LLMs without developers having to write a single line of code.

last push3 months ago languageJavaScript licenseApache-2.0
50 nimbalyst ★ 1.7K

Nimbalyst - The open-source visual workspace for Claude Code, Codex, and OpenCode. Run multiple coding agents in parallel, edit their work visually in markdown,

last push7 hours ago languageTypeScript licenseMIT
51 reviewboard ★ 1.7K

An extensible and friendly code review tool for projects and companies of all sizes.

last push7 hours ago languagePython licenseMIT
52 MaterialAbout ★ 1.5K

🔖 It's a material-design about screen to use on your Android apps. A developer profile and application information easy to integrate.

last push7 months ago languageJava licenseMIT
53 Ptero ★ 1.3K

AI Chat with powerful models for free

last push2 days ago languagePHP licenseApache-2.0
54 crit ★ 1.1K

Your feedback loop with the agent

last push21 hours ago languageGo licenseMIT
55 sandboxd ★ 944

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 comma

last push9 days ago languageGo licenseMIT
56 Foundry ★ 872

The foundation layer for agentic intelligence.

last push29 days ago languagePython licenseApache-2.0
57 GitComet ★ 845

Fast, local-first Git GUI built in Rust

last push14 hours ago languageRust licenseAGPL-3.0
58 veritas-kanban ★ 831

Lightweight orchestration harness built for your AI agents. The unfiltered truth about where your project stands.

last push3 days ago languageTypeScript licenseMIT
59 dev-proxy ★ 831

Simulate API failures, throttling, and chaos — all from your command line.

last push9 hours ago languageC# licenseMIT
60 kandev ★ 801

AI Kanban & Development Environment. Orchestrate multiple agents, review changes, open PRs. Multi-provider, self-hostable, no telemetry.

last push5 hours ago languageGo licenseAGPL-3.0

Related tags

← all tags

Frequently asked questions

How many open source developer-tools projects are there?

This registry tracks 69 projects tagged developer-tools, with 1,163,574 GitHub stars between them. The most-adopted is ponytail at 141,230 stars.

Are these developer-tools projects free to use?

Yes — 62 of the 69 carry an explicit open-source licence across 5 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?

62 of the 69 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.