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Open Source Developer Tools

A curated collection of the best open source software for building software: IDEs and editors, frameworks, API tooling, testing, version control, build and deployment pipelines, and AI coding assistants..

See also:AI Assisted CodingStars growing over the last 30 daysCode Analysis & TransformationBuild & DeploymentIntegration PlatformsFrameworks & PlatformsAPI Development & TestingTesting & Quality AssuranceStars growing over the last 30 daysTerminalsVersion Control & CollaborationWebsite BuildersIDEs & Code Editors

Baserow

No-code database and app builder you can self-host

  • Stars

    6,272

  • Last commit

    15 hours ago

  • License

    MIT
Open-source platform for building databases, internal apps, and automated workflows without writing code. Available on cloud or self-hosted.

Open Source Alternative to:

Airtable

It's a Plan

Issue tracker where people and AI agents share one board

  • Stars

    Stars growing quickly over the last 30 days2,176

  • Last commit

    13 hours ago

  • License

    AGPL-3.0
Self-hosted issue tracker with boards, timelines, initiatives and dashboards, where AI agents take assigned issues like teammates. AGPL-3.0, no per-seat fees.

Open Source Alternative to:

Jira

OpenCode

AI
AI coding agent for terminal, IDE, and desktop

  • Stars

    Stars growing over the last 30 days224,667

  • Last commit

    5 hours ago

  • License

    MIT
Open source AI coding agent that works in your terminal, IDE, or desktop app, supporting 75+ LLM providers with no code storage.

Open Source Alternative to:

Claude Code

n8n

Build AI agents and automations you can follow step by step

  • Stars

    209,589

  • Last commit

    6 hours ago

  • License

    Unknown
Visual workflow automation platform for building AI agents and business processes, with 500+ integrations, human approval steps, code when needed, and self-hosting.

Open Source Alternative to:

Make

Codex CLI

AI
AI coding agent that works inside your terminal

  • Stars

    133,262

  • Last commit

    5 hours ago

  • License

    Apache-2.0
Terminal-based AI coding agent that inspects files, edits code, runs commands, and integrates into CI pipelines using OpenAI's Codex models.

Open Source Alternative to:

Claude Code

Langflow

AI
Visual builder for AI agents and RAG pipelines

  • Stars

    156,345

  • Last commit

    10 hours ago

  • License

    MIT
Build, deploy, and iterate on AI agents, RAG applications, and MCP servers using a drag-and-drop visual interface backed by Python.

Open Source Alternative to:

Voiceflow

Paperclip

AI
Org chart, budgets, and governance for AI agent teams

  • Stars

    Stars growing quickly over the last 30 days111,212

  • Last commit

    6 hours ago

  • License

    MIT
Manages teams of AI agents across business functions with org charts, goal alignment, cost tracking, ticket tracing, and board-level governance controls.

Open Source Alternative to:

Claude Managed Agents

pi

AI
Minimal terminal coding agent you can fully customize

  • Stars

    Stars growing over the last 30 days120,164

  • Last commit

    6 hours ago

  • License

    MIT
Terminal-based coding agent with a minimal core, 15+ LLM providers, tree-structured session history, and a TypeScript extension system for building your own workflows.

Open Source Alternative to:

Claude Code

Orca

AI
Run multiple AI coding agents in parallel, side by side

  • Stars

    Stars growing quickly over the last 30 days115,876

  • Last commit

    6 hours ago

  • License

    MIT
Agent Development Environment that runs Claude Code, Codex, Gemini, and other CLI agents in parallel across isolated git worktrees, with terminals, browser, diff review, and git tools built in.

Open Source Alternative to:

Codex

Supabase

Postgres-powered backend platform for production apps

  • Stars

    Stars growing over the last 30 days114,547

  • Last commit

    5 hours ago

  • License

    Apache-2.0
Provides a full backend stack built on Postgres: authentication, auto-generated APIs, edge functions, realtime subscriptions, file storage, and vector search.

Open Source Alternative to:

Firebase

OpenHands

AI
Autonomous coding agents that complete real engineering tasks

  • Stars

    92,692

  • Last commit

    9 hours ago

  • License

    MIT
AI agent platform that runs autonomous coding agents to plan, write, and ship changes across codebases end-to-end, with support for any model and self-hosted deployment.

Open Source Alternative to:

Claude Code

Zed

High-performance code editor built for speed and AI

  • Stars

    92,752

  • Last commit

    6 hours ago

  • License

    GPL-3.0
A Rust-built code editor from the creators of Atom and Tree-sitter, combining native performance with multiplayer collaboration and deep AI integration.

Open Source Alternative to:

Cursor

Neovim

Hyperextensible, Lua-powered Vim-based text editor

  • Stars

    103,366

  • Last commit

    8 hours ago

  • License

    Unknown
A modernized Vim fork with built-in LSP, Lua scripting, Tree-sitter parsing, and an async plugin architecture that works the same across every platform.

Open Source Alternative to:

Cursor

Cline

AI
Open-source AI coding agent for your editor and terminal

  • Stars

    71,331

  • Last commit

    6 hours ago

  • License

    Apache-2.0
AI coding agent that runs inside VS Code and the terminal, supporting multi-file edits, bash execution, and any LLM provider via bring-your-own-key.

Open Source Alternative to:

Claude Code

Hoppscotch

Sleek, intuitive API development and testing platform

  • Stars

    80,754

  • Last commit

    1 day ago

  • License

    MIT
Lightweight, fast, and feature-rich API client for developers. Test, debug, and document APIs with ease in a clean, modern interface.

Open Source Alternative to:

Postman

Open Interpreter

AI
Coding agent that runs on local and open-weight models

  • Stars

    68,794

  • Last commit

    1 day ago

  • License

    Apache-2.0
Coding agent that lets LLMs write and execute code, manage files, and control your computer using local or low-cost models.

Open Source Alternative to:

Claude Code

T3 Code

AI
AI-powered coding made simple and efficient

  • Stars

    Stars growing quickly over the last 30 days47,064

  • Last commit

    6 hours ago

  • License

    MIT
Advanced AI coding assistant that enhances development workflow with intelligent code suggestions, automated debugging, and seamless integration.

Open Source Alternative to:

Claude Code

Goose

AI
General-purpose AI agent for code, workflows, and more

  • Stars

    56,238

  • Last commit

    16 hours ago

  • License

    Apache-2.0
Local AI agent with a desktop app, CLI, and API that connects to 15+ LLM providers and 70+ extensions for code, research, automation, and data tasks.

Open Source Alternative to:

Claude Code

Warp

AI
A modern terminal built around AI coding agents

  • Stars

    65,878

  • Last commit

    6 hours ago

  • License

    AGPL-3.0
Terminal built for running AI coding agents like Claude Code, Codex, and Gemini CLI, with shared context, interactive code review, and multi-session management.

Open Source Alternative to:

Terminal

Coolify

Deploy apps, databases, and services to your own server

  • Stars

    Stars growing over the last 30 days65,658

  • Last commit

    16 hours ago

  • License

    Apache-2.0
Self-hostable deployment platform that lets you deploy apps, databases, and 280+ one-click services to any server via SSH, with Git integration and automatic SSL.

Open Source Alternative to:

Vercel

Ghostty

Fast GPU-accelerated terminal with native UI design

  • Stars

    63,587

  • Last commit

    15 hours ago

  • License

    MIT
Experience blazing-fast terminal performance with GPU acceleration and platform-native UI. Cross-platform compatibility meets modern design.

Open Source Alternative to:

Warp

NocoDB

Transform databases into intuitive spreadsheets instantly

  • Stars

    65,433

  • Last commit

    17 hours ago

  • License

    AGPL-3.0
Convert any database into a no-code platform with spreadsheet interface. Connect PostgreSQL/MySQL or use hosted database. Scale to millions of rows effortlessly.

Open Source Alternative to:

Airtable

Appwrite

Open-source backend platform for rapid app development

  • Stars

    57,862

  • Last commit

    6 hours ago

  • License

    BSD-3-Clause
Open-source development platform with built-in backend infrastructure, web hosting, and security features. Scale applications using your preferred programming languages.

Open Source Alternative to:

Supabase

Alacritty

High-performance terminal with GPU acceleration

  • Stars

    66,115

  • Last commit

    3 days ago

  • License

    Apache-2.0
Modern cross-platform terminal emulator with OpenGL acceleration, extensive configuration options, and vi mode support for enhanced productivity.

Open Source Alternative to:

Warp

Gitea

Self-hosted Git service for seamless collaboration

  • Stars

    58,896

  • Last commit

    6 hours ago

  • License

    MIT
A lightweight, fast, and customizable Git service that simplifies code hosting and collaboration for teams of all sizes.

Open Source Alternative to:

GitHub

Bruno

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

  • Stars

    48,182

  • Last commit

    6 hours ago

  • License

    MIT
A modern, user-friendly API client that simplifies API testing and development with a clean interface and powerful features.

Open Source Alternative to:

Postman

Aider

AI
AI pair programmer that works inside your terminal

  • Stars

    49,958

  • Last commit

    6 months ago

  • License

    Apache-2.0
Terminal-based AI coding tool that lets you edit existing codebases or start new projects using LLMs like Claude, GPT, and DeepSeek.

Open Source Alternative to:

Claude Code

Dokploy

Effortless deployment and management for any VPS

  • Stars

    38,242

  • Last commit

    15 hours ago

  • License

    Unknown
Streamline your deployment process with Dokploy. Manage applications and databases on any VPS using Docker and Traefik for improved performance and security.

Open Source Alternative to:

Vercel

ToolJet

Build internal tools rapidly without coding

  • Stars

    41,196

  • Last commit

    6 hours ago

  • License

    AGPL-3.0
Open-source low-code platform for creating custom internal tools, dashboards, and admin panels with a drag-and-drop interface

Open Source Alternative to:

Retool

Gogs

Self-hosted Git service that's lightweight and easy to install

  • Stars

    47,918

  • Last commit

    2 days ago

  • License

    MIT
Lightweight, cross-platform Git service for self-hosting. Easy installation, minimal requirements, runs on Raspberry Pi. 100% open source and free.

Open Source Alternative to:

GitHub

Continue

AI
Open-source coding agent for your IDE and terminal

  • Stars

    36,408

  • Last commit

    8 hours ago

  • License

    Apache-2.0
Runs source-controlled AI checks on every pull request, enforcing your engineering standards as native GitHub status checks with suggested fixes.

Open Source Alternative to:

CodeRabbit

AppSmith

Empower your team to build custom internal tools rapidly

  • Stars

    41,161

  • Last commit

    13 hours ago

  • License

    Apache-2.0
Low-code platform for creating powerful internal tools and dashboards with drag-and-drop ease, robust integrations, and customizable workflows.

Open Source Alternative to:

Make

Floci

Local AWS emulator with no account, gates, or paid tiers

  • Stars

    Stars growing quickly over the last 30 days29,853

  • Last commit

    9 hours ago

  • License

    MIT
Run AWS services locally in development and CI without an account, quotas, or feature restrictions. MIT licensed, no telemetry.

Open Source Alternative to:

LocalStack

Grok Build

AI
AI coding agent and CLI for complex terminal workflows

  • Stars

    27,690

  • Last commit

    1 month ago

  • License

    Apache-2.0
Terminal-based coding agent powered by Grok 4.5 that plans, builds, tests, and deploys across any codebase with parallel subagents and plugin support.

Open Source Alternative to:

Claude Code

Kilo

AI
AI coding agent for VS Code, JetBrains, CLI, and Cloud

  • Stars

    27,867

  • Last commit

    6 hours ago

  • License

    MIT
Open source AI coding agent with 500+ models, bring-your-own-key support, and specialized modes for writing, debugging, and planning code across IDEs and CLI.

Open Source Alternative to:

Claude Code

Qwen Code

AI
Open source AI coding agent for the terminal and IDE

  • Stars

    29,016

  • Last commit

    6 hours ago

  • License

    Apache-2.0
Terminal-based AI coding agent that reads your codebase, edits files and runs commands, with support for Qwen, OpenAI, Anthropic, Gemini and local models.

Open Source Alternative to:

Claude Code

TipTap

Craft rich text experiences with ease

  • Stars

    38,962

  • Last commit

    6 hours ago

  • License

    MIT
A customizable, open-source rich text editor framework for modern web applications, built on Vue and Prosemirror

Insomnia

Powerful API development and testing made effortless

  • Stars

    40,127

  • Last commit

    6 hours ago

  • License

    Apache-2.0
Intuitive API client for REST, GraphQL, and gRPC. Debug, test, and collaborate on APIs with ease across platforms.

Open Source Alternative to:

Postman

Directus

Open-source data platform for effortless content management

  • Stars

    38,827

  • Last commit

    15 hours ago

  • License

    Unknown
A versatile headless CMS and API engine that simplifies data management, content creation, and application development.

Open Source Alternative to:

WordPress

Refine

Build data-rich React apps with ease and flexibility

  • Stars

    35,997

  • Last commit

    2 months ago

  • License

    MIT
A React-based framework for rapid development of internal tools, admin panels, and dashboards with powerful data handling capabilities.

Open Source Alternative to:

Retool

Harness

End-to-end open source software delivery platform

  • Stars

    38,826

  • Last commit

    2 days ago

  • License

    Apache-2.0
Streamline code delivery with an open-source CI/CD platform featuring Git integration, fast pipelines, and hosted development environments.

Open Source Alternative to:

GitHub

Zellij

Organize terminal sessions with built-in layouts, tabs, and panes

  • Stars

    35,944

  • Last commit

    1 day ago

  • License

    MIT
A terminal multiplexer that organizes your workflow with intuitive layouts, tabs, and panes. Includes batteries for seamless terminal workspace management.

Open Source Alternative to:

Warp
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