BestDeveloper ToolsTools

Essential open source tools for software developers. Browse API clients like Hoppscotch and Bruno, no-code database platforms like NocoDB and Supabase, container management tools, workflow automation engines, and AI-powered coding assistants. Build, test, and ship software faster with community-driven alternatives to commercial developer tools.

builder

Visual Development for React, Vue, Svelte, Qwik, and more

Page Builder

colima

Container runtimes on macOS (and Linux) with minimal setup

Containers

xstate

State machines, statecharts, and actors for complex logic

State Machine

tabby

Self-hosted AI coding assistant

AI

insomnia

The open-source, cross-platform API client for GraphQL, REST, WebSockets, SSE and gRPC. With Cloud, Local and Git storage.

API Client

bruno

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

API Client

n8n

Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations.

Automation

massCode

A free, open-source developer workspace. Snippets, notes, HTTP requests, calculations, and dev tools in one local-first app.

Code Snippets

osem

Open Source Event Manager. An event management tool tailored to Free and Open Source Software conferences.

Conference

azimutt

Explore, document and optimize any database

Database

puck

The visual editor for React.

Visual Editor

xyflow

React Flow | Svelte Flow - Powerful open source libraries for building node-based UIs with React (https://reactflow.dev) or Svelte (https://svelteflow.dev). Ready out-of-the-box and infinitely customizable.

React Flow

formbricks

Open Source Qualtrics Alternative

Survey Platform

AionUi

Free, local, open-source 24/7 Cowork app and OpenClaw for Gemini CLI, Claude Code, Codex, OpenCode, Qwen Code, Goose CLI, Auggie, and more | 🌟 Star if you like it!

AI Agent

fzf

:cherry_blossom: A command-line fuzzy finder

fuzzy finder

hoppscotch

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

API Client

scalar

Scalar is an open-source API platform:　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　🌐 Modern REST API Client　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　📖 Beautiful API References　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　✨ 1st-Class OpenAPI/Swagger Support

API Client

sentry

Developer-first error tracking and performance monitoring

Error Monitoring

supabase

The Postgres development platform. Supabase gives you a dedicated Postgres database to build your web, mobile, and AI applications.

Database

dagu

A lightweight workflow engine built the way it should be: declarative, file-based, self-contained, air-gapped ready. One binary that scales from laptop to distributed cluster. Used as a sovereign AI-agent orchestration infrastructure.

Workflow Engine

OpenHands

🙌 OpenHands: AI-Driven Development

Agent

DirectoryLister

📂 Directory Lister is the easiest way to expose the contents of any web-accessible folder for browsing and sharing.

Directory Browser

gotenberg

A developer-friendly API for converting many document formats into PDF files, and more!

API

ntfy

Send push notifications to your phone or desktop using PUT/POST

Push Notifications

unison

Unison file synchronizer

File Synchronization

maxun

🔥 The open-source no-code platform for web scraping, crawling, search and AI data extraction • Turn websites into structured APIs in minutes 🔥

Web Scraping

cloudbeaver

Cloud Database Manager

Cloud

architecture-decision-record

Architecture decision record (ADR) examples for software planning, IT leadership, and template documentation

Architecture Decision Record

ripgrep

ripgrep recursively searches directories for a regex pattern while respecting your gitignore

grep

pyload

The free and open-source Download Manager written in pure Python

Download Manager