Best Open Source Developer Tools Projects

Popular front-end toolkit for responsive websites

Dify

Build AI workflows, RAG pipelines and agents on one visual platform

Neovim

Hyperextensible Vim-based text editor

PocketBase

An entire backend — database, auth, files, realtime — in one small binary

Fast, concise JavaScript library for DOM and AJAX

MeiliSearch

Instant search engine with sub-50ms responses

Original Angular framework for dynamic web apps

Progressive JavaScript framework for user interfaces

Aider

AI pair programming in your terminal

ToolJet

An open-source low-code framework for building internal tools.

Appsmith

Open-source low-code platform

PHP web framework with elegant, expressive syntax

VSCodium

Free/Libre Open Source Software Binaries of VS Code.

Reusable PHP components and a full-stack framework

Notepad++

Free source code editor and Notepad replacement for Windows

Feature-detection library for web browsers

Responsively

A modified web browser that helps in responsive web development.

Temporal

The durable execution system for resilient applications.

Univer

An open-source alternative to Google Sheets and Excel.

VuePress

Vue-powered Static Site Generator.

Lightweight modular front-end framework

Drag-and-drop file upload library

Maxun

Turn any website into a structured API

Verdaccio

A lightweight Node.js private proxy registry.