Browse free open source JavaScript Build Tools and projects below. Use the toggles on the left to filter open source JavaScript Build Tools by OS, license, language, programming language, and project status.

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  • 1
    Node-RED

    Node-RED

    Low-code programming for event-driven applications

    Node-RED is a programming tool for wiring together hardware devices, APIs and online services in new and interesting ways. It provides a browser-based editor that makes it easy to wire together flows using the wide range of nodes in the palette that can be deployed to its runtime in a single-click. Node-RED provides a browser-based flow editor that makes it easy to wire together flows using the wide range of nodes in the palette. Flows can be then deployed to the runtime in a single-click. JavaScript functions can be created within the editor using a rich text editor. A built-in library allows you to save useful functions, templates or flows for re-use. The light-weight runtime is built on Node.js, taking full advantage of its event-driven, non-blocking model. This makes it ideal to run at the edge of the network on low-cost hardware such as the Raspberry Pi as well as in the cloud.
    Downloads: 57 This Week
    Last Update:
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  • 2
    Pencil

    Pencil

    The Pencil Project's unique mission is to build a free tool

    Pencil is built for the purpose of providing a free and open-source GUI prototyping tool that people can easily install and use to create mockups in popular desktop platforms. The latest stable version of Pencil is 3.1.0 which contains stability fixes and many new features. More details can befound in the releaste notes. Pencil provides various built-in shapes collection for drawing different types of user interface ranging from desktop to mobile platforms. Starting from 2.0.2, Pencil is shipped with Android and iOS UI stencils pre-installed. This makes it even easier to start protyping apps with a simple installation. Starting from 2.0.2 Pencil has even more shape collections included by default. The list of built-in collections now includes general-purpose shapes, flowchart elements, desktop/web UI shapes, Android and iOS GUI shapes.
    Downloads: 28 This Week
    Last Update:
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  • 3
    Trilium Notes

    Trilium Notes

    Build your personal knowledge base

    Trilium is provided as either desktop application (Linux and Windows) or web application hosted on your server (Linux). Mac OS desktop build is available, but it is unsupported. Synchronization with self-hosted sync server, strong note encryption with per-note granularity, relation maps and link maps for visualizing notes and their relations, and scripting, see Advanced showcases. Scales well in both usability and performance upwards of 100 000 notes, touch optimized mobile frontend for smartphones and tablets, night theme, evernote and Markdown import & export, as well as web clipper for easy saving of web content. If you want to use Trilium on the desktop, download binary release for your platform from latest release, unzip the package and run trilium executable. Install the application on both a server, for web access and data synchronization, and desktop instance(s). This allows all the data to be stored on the server.
    Downloads: 12 This Week
    Last Update:
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  • 4
    Brunch

    Brunch

    Web applications made easy

    Brunch lets you focus on what matters most, solving real problems instead of messing around with the glue. By being opinionated about your build pipeline, Brunch is able to provide a smooth and fast experience, and makes your config files take a drastic cut. It doesn't take much to get around with brunch. 'brunch new' to create a new project. 'brunch build' to build. 'brunch watch' to live-compile. Installation is one-line, once you have node.js. You will find that the typical config of a Brunch application is an order of magnitude simpler, compared to Webpack, Grunt, or Gulp. Besides configs, brunch is also simpler in terms of commands. Grunt / Gulp commands replicate all plugins it loads. Brunch always has three commands: new, build and watch. Build / watch commands may receive optional production flag which will tell Brunch to optimize assets, javascripts and stylesheets.
    Downloads: 9 This Week
    Last Update:
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  • 5
    vConsole

    vConsole

    A lightweight, extendable front-end developer tool for mobile web page

    vConsole is a lightweight, extendable front-end developer tool for mobile web page. A plugin allows you to add a new tab, add one or more tool button(s). You can customize the functions of the tab and buttons. After imported, vConsole should be inited manually. When vConsole is not loaded, logs will be printed to native console. After importing vConsole, logs will be printed to both front-end console and native console. Some useful vConsole properties and methods are available for plugin development. You can destroy an vConsole instance object and remove vConsole panel from document. You can also add a new plugin to vConsole. Duplicate plugin will be ignored. Create an vConsole plugin object, bind plugin events to this object, and add this object to vConsole. While installing and running a plugin, vConsole will trigger some events to allow a plugin customizing it's functions.
    Downloads: 7 This Week
    Last Update:
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  • 6
    Summernote

    Summernote

    Super simple WYSIWYG editor

    Simply download and attach your js, css with bootstrap. Customize by Initializing various options and modules. Summernote is licensed under MIT and maintained by the community. Integrate it with any back-end. 3rd parties available in django, rails, angular. Bootstrap uses certain HTML elements and CSS properties which require HTML5 doctype. Summernote uses the Open Source libraries jQuery and Bootstrap, if you are using the Boostrap 3 or 4 versions of Summernote, or just jQuery if you use the Lite version of Summernote. Summernote allows you to customize the toolbar. You can compose a toolbar with pre-shipped buttons. Air-mode give an interface without the Toolbar. To reveal popover Toolbar, select a text where you want to modify. Simply turn on airMode and just focus on text. Styles change according to Bootstraps Theme. The editor uses the Bootswatch Themes based on Bootstrap 3, you can also do the same with Bootstrap 4.
    Downloads: 5 This Week
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  • 7
    Quasar Framework

    Quasar Framework

    Build high-performance VueJS user interfaces in record time

    Effortlessly build high-performance & high-quality Vue.js 3 user interfaces in record time. Combine the power of Quasar UI with Quasar CLI. One source code for all platforms simultaneously with all the latest and greatest best practices out of the box. Focus only on your app's features and forget about the boilerplate around it. Build high-performance VueJS user interfaces in record time: responsive Single Page Apps, SSR Apps, PWAs, Browser extensions, Hybrid Mobile Apps and Electron Apps. If you want, all using the same codebase! You get a state-of-the-art UI (that follows Material Guidelines) for your websites and apps out of the box. Best support for desktop and mobile browsers (including iOS Safari!) out of the box. Best-in-class support for each build mode (SPA, SSR, PWA, Mobile app, Desktop app & Browser Extension) and the best developer experience through a tight integration with our own CLI.
    Downloads: 3 This Week
    Last Update:
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  • 8
    UpUp

    UpUp

    Easily create sites that work offline as well as online

    UpUp is a tiny JavaScript library that makes sure your users can always access your site's content, even when they're on a plane, in an elevator, or 20,000 leagues under the sea. Your users are no longer sitting at their desktops, with a wire connecting them to the internet. They are visiting your site from a phone in an elevator, from their tablet on the subway, or on their laptop while they sit cramped into seat 25 E. This is why modern browsers support service workers, a new technology which lets you serve your content to your users, even when they are offline. UpUp is a free, open-source project which makes using this modern magic as simple as calling one command. While easy to pick up, UpUp is powerful enough to support anything from showing simple messages, to making fully functional single-page applications available offline, with data customized for each of your users.
    Downloads: 3 This Week
    Last Update:
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  • 9
    Vulcan

    Vulcan

    A toolkit to quickly build apps with React, GraphQL & Meteor

    Vulcan is a framework that gives you a set of tools for quickly building React & GraphQL-based web applications. It can handle data loading, e-mail notifications, automatic form generation, and much more, out of the box. Vulcan is unique in that it spans the full-stack, from the database to the browser. While there exist many excellent back-end frameworks or backend-as-a-service providers, these all still require you to handle the front-end code yourself, including building a set of components to read, write, and display data. However, being full-stack, Vulcan is able to speed up these repetitive tasks by providing a whole range of helper components that are fine-tuned to the Vulcan back-end, and as a result just work out of the box. In order to make working with Vulcan easier (especially when it comes to updating the core packages), you are also free to follow the more complicated “two-repo” pattern, with the two repositories.
    Downloads: 3 This Week
    Last Update:
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  • 10
    EpicReact.Dev

    EpicReact.Dev

    Build a ReactJS App workshop

    EpicReact.Dev is the codebase used in the “Build an Epic React App” workshop, where participants build a complete React application from scratch. The project demonstrates how to structure a modern React app, including data modeling, authentication, routing, testing, and interaction with a backend. It uses a realistic “bookshelf” domain where users can manage lists of books, track reading status, and record notes, which provides a concrete context for learning. The repository includes setup scripts and system requirements checks for Git, Node, and npm, plus Docker and Codespaces options for people who struggle with local environments. A guided workflow, driven by a node go script and INSTRUCTIONS.md, lets learners move between exercises and extra credit steps while the repository updates the working files for each stage. Extensive tests, using Jest in watch mode, help students verify their solutions and learn how to work with test-driven feedback.
    Downloads: 2 This Week
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  • 11
    Knockout

    Knockout

    Tool to create rich, responsive UIs with JavaScript

    Easily associate DOM elements with model data using a concise, readable syntax. When your data model's state changes, your UI updates automatically. Implicitly set up chains of relationships between model data, to transform and combine it. Quickly generate sophisticated, nested UIs as a function of your model data. Get started with knockout.js quickly, learning to build single-page applications, custom bindings and more with interactive tutorials. Knockout is a JavaScript MVVM (a modern variant of MVC) library that makes it easier to create rich, desktop-like user interfaces with JavaScript and HTML. It uses observers to make your UI automatically stay in sync with an underlying data model, along with a powerful and extensible set of declarative bindings to enable productive development. For Node.js developers, Knockout is also available from npm.
    Downloads: 2 This Week
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  • 12
    Closure Library

    Closure Library

    Google's common JavaScript library

    The Closure Library is a broad, well-tested, modular, and cross-browser JavaScript library. You can pull just what you need from a large set of reusable UI widgets and controls, and from lower-level utilities for DOM manipulation, server communication, animation, data structures, unit testing, rich-text editing, and more. The Closure Library is server-agnostic and is intended for use with the Closure Compiler. The Closure Library serves as the base JavaScript library for many Google products. Now that the Closure Library is open source, more and more developers outside Google are integrating the library in their own projects. If you are developing a large or growing application, you may benefit from the Closure Library's breadth. A well-tested library can insulate you from cross-browser compatibility issues and the minutiae of client-side programming, letting you focus on the fun stuff.
    Downloads: 1 This Week
    Last Update:
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  • 13
    Create React App

    Create React App

    Set up a modern web app by running one command

    Create React App lets you create React apps quickly and easily-- no learning of build tools or build configurations necessary. All you need is one command, and you can get started in seconds. All tools are preconfigured and hidden, and with instant reloads you can focus on code, not build tools. With Create React App your apps need only one build dependency, so everything works together seamlessly, and when it’s time to deploy your bundles are automatically optimized. With Create React App it’s easy to start and easy to “eject”, if ever you want an advanced configuration and edit config files directly. It’s also very easy to maintain, as you only need a single command to upgrade to new versions.
    Downloads: 1 This Week
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  • 14
    Marked

    Marked

    A markdown parser and compiler. Built for speed

    A low-level markdown compiler for parsing markdown without caching or blocking for long periods of time. Light-weight while implementing all markdown features from the supported flavors & specifications. Available as a command-line interface (CLI) and running in client- or server-side JavaScript projects. The only completely secure system is the one that doesn't exist in the first place. Having said that, we take the security of Marked very seriously. To prevent ReDoS attacks you can run marked on a worker and terminate it when parsing takes longer than usual. Marked can be run in a worker thread on a node server, or a web worker in a browser. Only current and LTS Node.js versions are supported. End-of-life Node.js versions may become incompatible with Marked at any point in time.
    Downloads: 1 This Week
    Last Update:
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  • 15
    Onsen UI

    Onsen UI

    Mobile app development framework and SDK

    The most beautiful and efficient way to develop HTML5 hybrid and mobile web apps. Experience streamlined development with zero-time setup, using the technologies you already know and love, Javascript, HTML and CSS. A rich variety of UI components specially designed for mobile apps. Onsen UI provides tabs, side menu, stack navigation and tons of other components such as lists and forms. They all have iOS and Android Material design support, with automatic styling that will change the appearance of the app based on the platform. With Onsen UI you can truly support both Android and iOS with the same source code. Worried that PhoneGap / Cordova apps are slow? Fear not! All animations in Onsen UI have been tuned and optimized to perform well on a wide range of devices. We take great care to ensure that apps made using Onsen UI feel smooth even on lower end devices. Onsen UI is easy to learn while being a powerful tool to create complex mobile apps.
    Downloads: 1 This Week
    Last Update:
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  • 16
    PWA

    PWA

    (WIP) Universal PWA Builder

    PWA is a “universal, framework-agnostic PWA builder” developed by Luke Edwards (lukeed) that aims to let developers scaffold progressive web apps with minimal friction across different view frameworks or libraries. Unlike many CLI tools that target a specific framework (React, Vue, Svelte), this project intentionally tries to remain agnostic, supporting presets for Preact, React, Vue, Svelte and even vanilla JS, while offering all the PWA boilerplate you need (service workers, manifest, offline support) right out of the box. The project is designed for speed of setup: you run pwa init, choose your preset, then pwa build or pwa watch and you get a production-ready bundle with PWA features baked in. The README emphasizes that modern bundlers (Webpack, Rollup) and ecosystem maturity finally allow a universal CLI of this kind, whereas earlier attempts weren’t practical.
    Downloads: 1 This Week
    Last Update:
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  • 17
    UI Bootstrap

    UI Bootstrap

    Bootstrap components written in pure AngularJS by the AngularUI Team

    Bootstrap components written in pure AngularJS by the AngularUI Team. UI Bootstrap provides a set of native AngularJS directives based on Bootstrap's markup and CSS. As a result no dependency on jQuery or Bootstrap's JavaScript is required. Build files for all directives are distributed in several flavours: minified for production usage, un-minified for development, with or without templates. It should be noted that the -tpls files contain the templates bundled in JavaScript, while the regular version does not contain the bundled templates. Alternativelly, if you are only interested in a subset of directives, you can create your own build. Whichever method you choose the good news that the overall size of a download is fairly small: 122K minified for all directives with templates and 98K without (~31kB with gzip compression, with templates, and 28K gzipped without).
    Downloads: 1 This Week
    Last Update:
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  • 18
    YUI 3

    YUI 3

    A library for building richly interactive web applications

    YUI is a free, open source JavaScript and CSS framework for building richly interactive web applications. YUI is provided under a BSD license and is available on GitHub for forking and contribution. YUI's lightweight core and modular architecture make it scalable, fast, and robust. Built by frontend engineers at Yahoo!, YUI powers the most popular websites in the world. YUI's intuitive and well-documented API takes you from basic DOM handling to building performant and maintainable applications on desktop browsers, mobile devices, and servers. A thriving community, a carefully architected infrastructure, and a comprehensive suite of tools help you code like a pro, from simple web pages to complex web applications. YUI is free for all uses and is developed in the open on GitHub. Core team members can always be found in the forums and the #yui IRC channel on Freenode.
    Downloads: 1 This Week
    Last Update:
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  • 19
    Compiere ERP + CRM Business Solution
    Compiere ERP+CRM is the leading open source ERP solution for Distribution, Retail, Manufacturing and Service industries. Compiere automates accounting, supply chain, inventory and sales orders. Compiere ERP is distributed under GPL V2 by Compiere, Inc.
    Downloads: 4 This Week
    Last Update:
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  • 20
    WebDGap

    WebDGap

    A PhoneGap alternative for Desktop applications.

    WebDGap allows you to convert any website or HTML/CSS/JavaScript web application to a native Windows, Mac, Linux, and Chrome application. WebDGap also gives you the option to export as a Chrome popup extension, and you can export your app or website as a native PhoneGap application making your app available for mobile devices :)
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    Downloads: 15 This Week
    Last Update:
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  • 21
    kodeWeave

    kodeWeave

    HTML/CSS/JS and Markdown Playground For Web Designers and Developers

    kodeWeave is a realtime coding playground for HTML, CSS and Javascript. Similar to JSFiddle and JSBin, but kodeWeave was made to work offline but also as a prototyping application to build applications for desktop operating systems while on mobile devices. (PhoneGap Build is recommended for mobile devices) kodeWeave similar to jsfiddle, jsbin, dabblet, liveweave, codepen, cssdeck, cssdesk, tinkerbin, d3 playground, plunker and pastebin, but allows you to export your web app as a desktop and/or chrome application.
    Downloads: 7 This Week
    Last Update:
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  • 22
    the omega xvi project is a javascript debugger written in javascript. it can debug code, execute blocks of code or entire applications, as well as detect variables. because of its javascript nature, it can be run through a webpage, online.
    Downloads: 5 This Week
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  • 23

    Java Application Framework For All

    JAFFA is a Rich Web 2.0 POJO based Event-Driven SOA framework

    An Enterprise Focused Java Framework For Rapid Application Development. JAFFA is a Java web application development stack, build around Web 2.0 technologies (ExtJS, DWR, JAWR) with an extensive service architecture, meta-data layer and rules engine (based on JBoss AOP and Drools). It provides an event driven SOA infrastructure with advanced scheduling and queue sub-systems
    Downloads: 3 This Week
    Last Update:
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  • 24
    ElymOs

    ElymOs

    Linux OS from ubuntu, customisable for everyone, social and media

    Ubuntu based GNU/Linux system, use Gnome Shell. Easy for learn Linux and programming. All software of everyday use. Wine and Virtual Machine for use other OS.
    Downloads: 2 This Week
    Last Update:
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  • 25
    HTML Onlive Debugger

    HTML Onlive Debugger

    Realtime preview for designers and developers.

    When I got my first Android tablet; I realized how much web design and development were such a tedious process for a large majority of tablet and smart phone users. I found no applications available in Google Play that enabled live code debugging which gave me the incentive to develop one myself. After purchasing Google's developer fee, as well as AIDE I then released on Google Play for all to use.
    Downloads: 2 This Week
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