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.
GPU-accelerated terminal built for power users
Stars
35,296Last commit
9 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:
Full-stack Python platform for web apps and internal tools
Stars
28,951Last commit
5 hours 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:
Automate workflows with no-code integration platform
Stars
25,061Last commit
6 hours agoLicense
MIT
Open-source integration platform for seamless workflow automation. Connect apps, automate tasks, and boost productivity effortlessly.
Open Source Alternative to:
Visual React editor with real-time code updates
Stars
26,919Last commit
2 months 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:
Build unlimited AI apps locally with zero vendor lock-in
Stars
21,935Last commit
1 day agoLicense
Apache-2.0
Create full-stack AI applications using any model or tool. Run entirely on your machine with complete privacy, flexibility, and control over your code.
Open Source Alternative to:
Self-hosted mini-PaaS for deploying applications easily
Stars
32,185Last commit
11 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
21,477Last commit
9 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:
Build powerful web apps without complex coding
Stars
28,336Last commit
10 hours agoLicense
Unknown
Low-code platform for creating custom business applications quickly. Design, automate, and deploy with ease.
Open Source Alternative to:
Run coding agents from your phone, desktop, or terminal
Stars
20,992Last commit
5 hours agoLicense
Apache-2.0
Self-hosted orchestrator for coding agents like Claude Code, Codex, and Cursor, controlled from phone, desktop, web, or CLI.
Open Source Alternative to:
GPU-accelerated terminal emulator with multiplexing across all platforms
Stars
29,237Last commit
4 days agoLicense
MIT
Cross-platform terminal emulator and multiplexer with GPU acceleration, true color support, and Lua configuration. Runs on Linux, macOS, Windows, FreeBSD, and NetBSD.
Open Source Alternative to:
Build custom apps without code, deploy with ease
Stars
24,591Last commit
6 hours agoLicense
Unknown
Open-source no-code platform for creating tailored business applications quickly, with full customization and easy deployment options.
Open Source Alternative to:
Flexible database meets intuitive spreadsheet interface
Stars
21,893Last commit
14 hours agoLicense
AGPL-3.0
Open-source platform combining powerful database capabilities with a user-friendly spreadsheet interface for efficient data management and collaboration.
Open Source Alternative to:
AI agents that autonomously fix code and resolve GitHub issues
Stars
20,573Last commit
3 days agoLicense
MIT
State-of-the-art AI agent that uses language models like GPT-4o to autonomously solve GitHub issues, fix bugs, and implement features with configurable YAML setup.
Open Source Alternative to:
AI-powered DevSecOps for faster, secure software delivery
Stars
24,550Last commit
7 hours agoLicense
MIT
A comprehensive AI-powered DevSecOps platform that integrates development, security, and operations, streamlining software delivery and enhancing productivity.
Open Source Alternative to:
Revolutionize your Git workflow with simultaneous branches
Stars
21,811Last commit
7 hours agoLicense
FSL-1.1-MIT
GitButler is a powerful Git client that enables seamless work on multiple branches concurrently, enhancing your existing workflow.
Open Source Alternative to:
Cross-platform terminal with AI built in
Stars
22,507Last commit
2 days agoLicense
Apache-2.0
Enhance your terminal with AI, file previews, and web browsing. Available on MacOS, Linux, and Windows.
Open Source Alternative to:
A native code editor for macOS
Stars
23,072Last commit
2 months agoLicense
MIT
A lightweight, natively built editor. Open source and free forever. Develop any project using any language at speeds like never before.
Open Source Alternative to:
Turn production traffic into regression tests, no code changes
Stars
18,587Last commit
9 hours agoLicense
Apache-2.0
Captures real API traffic and dependency calls via eBPF to generate tests and mocks automatically, then replays them in CI to catch regressions before they ship.
Open Source Alternative to:
Fast, secure, offline API client with Git integration
Stars
19,321Last commit
8 hours agoLicense
MIT
A modern API client offering local-only data storage, Git integration, plugin extensibility, and multi-protocol support for developers.
Open Source Alternative to:
Run dozens of AI coding agents in parallel on your machine
Stars
15,229Last commit
7 hours agoLicense
Elastic-2.0
macOS app that orchestrates multiple AI coding agents simultaneously, each in its own isolated Git worktree, so you can work on many tasks at once.
Open Source Alternative to:
Build AI agents and RPA workflows without writing code
Stars
21,660Last commit
8 months agoLicense
Unknown
No-code platform for building AI agents and RPA workflows that automate repetitive business tasks across finance, HR, sales, and operations.
Open Source Alternative to:
Open-source workflow automation for developers
Stars
18,192Last commit
6 hours agoLicense
Unknown
Powerful, self-hosted platform for building and running workflows, scripts, and apps with code-first approach and collaborative features.
Open Source Alternative to:
Fast, secure cloud development environments on your infrastructure
Stars
17,029Last commit
5 hours agoLicense
AGPL-3.0
Self-hosted development platform that enables secure, scalable remote coding with automated provisioning, reduced cloud costs, and enterprise-grade security.
Open Source Alternative to:
High-performance API gateway with built-in LLM support
Stars
17,226Last commit
19 hours agoLicense
Apache-2.0
Apache APISIX is an open-source API gateway built on NGINX and etcd, offering dynamic routing, 100+ plugins, load balancing, authentication, and traffic management for APIs and LLM workloads.
Open Source Alternative to:
Visual database for workflow automation across apps
Stars
15,634Last commit
1 month agoLicense
AGPL-3.0
AITable.ai offers a visual database platform that simplifies workflow automation and connects to over 6,000 apps through integrations like Zapier and Make.
Open Source Alternative to:
Common layer for composing and governing AI agents
Stars
10,830Last commit
5 hours agoLicense
Apache-2.0
Meta-harness that sits above Claude Code, Codex, and other AI agents to add policy enforcement, sandboxing, and real-time collaborative sessions.
Open Source Alternative to:
Advanced terminal with modern features for Mac developers
Stars
18,168Last commit
7 hours agoLicense
GPL-2.0
Feature-rich terminal replacement for macOS with split panes, search, autocomplete, and extensive customization options for enhanced productivity.
Open Source Alternative to:
Secure and streamline database changes with CI/CD automation
Stars
14,567Last commit
13 hours agoLicense
MIT
Comprehensive platform for database schema migrations, security controls, and data masking with built-in review workflows and GitOps integration.
Build full-stack apps with TypeScript and real-time sync
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12,702Last commit
2 days agoLicense
Unknown
Open-source reactive database that keeps your web and mobile apps in sync. Write everything in TypeScript with built-in auth, cron jobs, and AI integration.
Open Source Alternative to:
Create powerful chatbots without coding
Stars
10,544Last commit
8 hours agoLicense
Unknown
Design, build, and deploy interactive chatbots with a visual editor. Integrate easily and collect data effortlessly.
Open Source Alternative to:
Build product integrations with 500+ APIs in hours
Stars
12,688Last commit
5 hours agoLicense
Elastic-2.0
Complete integrations platform with 500+ pre-built APIs, code-first approach, unified data models, and enterprise-grade security. Free tier available.
Open Source Alternative to:
Accelerate backend development with effortless scalability
Stars
12,450Last commit
4 days agoLicense
MPL-2.0
A powerful platform for building cloud backends, automating infrastructure, and simplifying development workflows for faster, more efficient coding.
Open Source Alternative to:
Flexible spreadsheets with database power
Stars
11,959Last commit
8 hours agoLicense
Apache-2.0
A versatile data management platform combining spreadsheet simplicity with relational database capabilities for efficient data organization and analysis.
Open Source Alternative to:
Open-source integration platform for seamless workflows
Stars
13,999Last commit
8 months agoLicense
Unknown
Self-hosted automation tool that connects your apps and services, enabling powerful integrations and efficient data flow across your ecosystem.
Open Source Alternative to:
Realtime client-side database for collaborative apps
Stars
10,546Last commit
17 days agoLicense
Apache-2.0
Instant is a database solution for building real-time and offline-enabled applications, simplifying the development of collaborative products.
Open Source Alternative to:
Visual web development with code-level control
Stars
9,073Last commit
6 hours agoLicense
AGPL-3.0
Powerful no-code platform for building responsive websites. Combines visual editing with full HTML/CSS customization.
Open Source Alternative to:
Create powerful forms with ease and flexibility
Stars
9,027Last commit
20 hours agoLicense
AGPL-3.0
A versatile form builder for crafting custom surveys, quizzes, and data collection tools with advanced features and integrations.
Open Source Alternative to:
Terminal-native AI coding agent built on ZSH
Stars
7,638Last commit
8 hours agoLicense
Apache-2.0
AI coding harness that runs inside your terminal, mixes LLMs per task, and uses multi-agent architecture to handle large codebases without bloating context.
Open Source Alternative to:
Universal API management for REST, GraphQL, gRPC & async
Stars
10,859Last commit
8 hours agoLicense
Unknown
Fast, scalable API management platform with open source gateway, analytics, dev portal and dashboard. Deploy anywhere with AI-ready governance and security.
Open Source Alternative to:
Build and deploy scalable storefronts with ease
Stars
10,957Last commit
4 months agoLicense
MIT
A comprehensive Frontend as a Service solution that helps developers create, deploy and manage enterprise ecommerce storefronts with ready integrations and cloud infrastructure.
Open Source Alternative to:
Flexible, scalable Node.js CMS and app framework
Stars
9,972Last commit
18 days agoLicense
MIT
A powerful, customizable content management system and application framework built on Node.js, GraphQL, and React
Open Source Alternative to:
Serverless backend platform for modern app development
Stars
9,357Last commit
6 hours agoLicense
MIT
Fully managed backend infrastructure with built-in authentication, database, storage, and serverless functions for rapid application development.
Open Source Alternative to:
Capture – Capture screenshots, generate PDFs, scrape content, extract metadata, and automate browsers with one API.
Windshift
Postiz
Bright Data