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.
No-code database and app builder you can self-host
Stars
5,619Last commit
1 day agoLicense
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:
AI coding agent for terminal, IDE, and desktop
Stars
198,419Last commit
8 hours agoLicense
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:
Visual workflow automation with code flexibility and AI agents
Stars
200,967Last commit
8 hours agoLicense
Unknown
Build automated workflows connecting 500+ apps, write custom code, and deploy AI agents with full visibility into every decision. Self-hostable or cloud.
Open Source Alternative to:
Visual builder for AI agents and RAG pipelines
Stars
153,345Last commit
1 day agoLicense
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:
Minimal terminal coding agent you can fully customize
Stars
91,787Last commit
20 hours agoLicense
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:
Postgres-powered backend platform for production apps
Stars
108,090Last commit
8 hours agoLicense
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:
Autonomous coding agents that complete real engineering tasks
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84,251Last commit
1 day agoLicense
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:
High-performance code editor built for speed and AI
Stars
88,757Last commit
9 hours agoLicense
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:
Open-source AI coding agent for your editor and terminal
Stars
66,347Last commit
9 hours agoLicense
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:
Sleek, intuitive API development and testing platform
Stars
80,050Last commit
1 day agoLicense
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:
A modern terminal built around AI coding agents
Stars
64,278Last commit
8 hours agoLicense
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:
Open-source backend in a single file
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60,699Last commit
4 days agoLicense
MIT
A lightweight, self-hosted backend solution with real-time database, authentication, and file storage capabilities.
Open Source Alternative to:
Run multiple AI coding agents in parallel, side by side
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46,758Last commit
20 hours agoLicense
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:
Deploy apps, databases, and services to your own server
Stars
60,687Last commit
9 hours agoLicense
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:
Fast GPU-accelerated terminal with native UI design
Stars
59,779Last commit
8 hours agoLicense
MIT
Experience blazing-fast terminal performance with GPU acceleration and platform-native UI. Cross-platform compatibility meets modern design.
Open Source Alternative to:
Transform databases into intuitive spreadsheets instantly
Stars
64,557Last commit
20 hours agoLicense
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:
Open-source backend platform for rapid app development
Stars
57,035Last commit
12 hours agoLicense
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:
High-performance terminal with GPU acceleration
Stars
65,402Last commit
15 days agoLicense
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:
Self-hosted Git service for seamless collaboration
Stars
57,440Last commit
8 hours agoLicense
MIT
A lightweight, fast, and customizable Git service that simplifies code hosting and collaboration for teams of all sizes.
Open Source Alternative to:
Lightweight, fast, and open-source API client for developers
Stars
46,380Last commit
8 hours agoLicense
MIT
A modern, user-friendly API client that simplifies API testing and development with a clean interface and powerful features.
Open Source Alternative to:
AI pair programmer that works inside your terminal
Stars
48,282Last commit
3 months agoLicense
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:
Build internal tools rapidly without coding
Stars
40,205Last commit
20 hours agoLicense
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:
Self-hosted Git service that's lightweight and easy to install
Stars
47,729Last commit
12 days agoLicense
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:
Effortless deployment and management for any VPS
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36,652Last commit
3 days agoLicense
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:
Open-source coding agent for your IDE and terminal
Stars
35,519Last commit
9 hours agoLicense
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:
Empower your team to build custom internal tools rapidly
Stars
40,681Last commit
20 hours agoLicense
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:
AI coding agent and CLI for complex terminal workflows
Stars
25,508Last commit
1 day agoLicense
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:
Craft rich text experiences with ease
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38,050Last commit
9 hours agoLicense
MIT
A customizable, open-source rich text editor framework for modern web applications, built on Vue and Prosemirror
AI coding agent for VS Code, JetBrains, CLI, and Cloud
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26,897Last commit
1 day agoLicense
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:
Powerful API development and testing made effortless
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39,953Last commit
23 hours agoLicense
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:
AI-powered code completion for seamless development
Stars
33,829Last commit
2 months agoLicense
Apache-2.0
Self-hosted AI coding assistant that enhances productivity with context-aware suggestions and privacy-focused implementation.
Open Source Alternative to:
Open-source data platform for effortless content management
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37,441Last commit
8 hours agoLicense
Unknown
A versatile headless CMS and API engine that simplifies data management, content creation, and application development.
Open Source Alternative to:
Organize terminal sessions with built-in layouts, tabs, and panes
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34,940Last commit
5 days agoLicense
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:
Build data-rich React apps with ease and flexibility
Stars
35,524Last commit
2 months agoLicense
MIT
A React-based framework for rapid development of internal tools, admin panels, and dashboards with powerful data handling capabilities.
Open Source Alternative to:
End-to-end open source software delivery platform
Stars
37,991Last commit
15 hours agoLicense
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:
Full-stack Python platform for web apps and internal tools
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28,827Last commit
3 days agoLicense
Apache-2.0
Build, iterate, and deploy full-stack web apps entirely in Python. Reflex combines an AI app builder, a full-stack framework, and one-click deployment in one platform.
Open Source Alternative to:
GPU-accelerated terminal built for power users
Stars
34,431Last commit
22 hours agoLicense
GPL-3.0
High-performance terminal emulator with GPU acceleration, graphics support, and advanced scripting capabilities for developers and system administrators.
Open Source Alternative to:
Visual React editor with real-time code updates
Stars
26,511Last commit
27 days agoLicense
Apache-2.0
Onlook is an open-source desktop app that allows you to visually edit React applications and automatically write changes back to your code in real-time.
Open Source Alternative to:
AI-powered coding made simple and efficient
Stars
19,053Last commit
9 hours agoLicense
MIT
Advanced AI coding assistant that enhances development workflow with intelligent code suggestions, automated debugging, and seamless integration.
Open Source Alternative to:
Automate workflows with no-code integration platform
Stars
23,849Last commit
8 hours agoLicense
MIT
Open-source integration platform for seamless workflow automation. Connect apps, automate tasks, and boost productivity effortlessly.
Open Source Alternative to:
Self-hosted mini-PaaS for deploying applications easily
Stars
32,099Last commit
12 hours agoLicense
MIT
A Docker-powered platform that lets you deploy Heroku-compatible applications via Git, with buildpack support and container isolation.
Open Source Alternative to:
Create, customize, and manage your website with ease
Stars
21,337Last commit
10 hours agoLicense
Unknown
A versatile, user-friendly platform for building and managing websites, from simple blogs to complex e-commerce stores.
Open Source Alternative to:
Sent – Messaging Infrastructure for Developers. One API for SMS, WhatsApp, and RCS across 190+ countries.
Sent
Sevalla
Sent