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

  • Rezku Point of Sale Icon
    Rezku Point of Sale

    Designed for Real-World Restaurant Operations

    Rezku is an all-inclusive ordering platform and management solution for all types of restaurant and bar concepts. You can now get a fully custom branded downloadable smartphone ordering app for your restaurant exclusively from Rezku.
    Learn More
  • The AI workplace management platform Icon
    The AI workplace management platform

    Plan smart spaces, connect teams, manage assets, and get insights with the leading AI-powered operating system for the built world.

    By combining AI workflows, predictive intelligence, and automated insights, OfficeSpace gives leaders a complete view of how their spaces are used and how people work. Facilities, IT, HR, and Real Estate teams use OfficeSpace to optimize space utilization, enhance employee experience, and reduce portfolio costs with precision.
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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: 84 This Week
    Last Update:
    See Project
  • 2
    Node.js

    Node.js

    Cross-platform JavaScript runtime environment

    Node.js is a free, open-source, cross-platform JavaScript runtime environment that allows developers to run JavaScript outside of the browser. It is built on Chrome’s V8 engine and is designed for building fast, scalable network applications. Node.js enables developers to create servers, APIs, command-line tools, and full-stack web applications using a single programming language. Its non-blocking, event-driven architecture makes it highly efficient for handling concurrent requests. The ecosystem is supported by npm, one of the largest package managers, providing access to thousands of libraries and tools. Node.js is widely used for backend development, real-time applications, and microservices architectures.
    Downloads: 35 This Week
    Last Update:
    See Project
  • 3
    DragonBones Runtime

    DragonBones Runtime

    DragonBones TypeScript / JavaScript Runtime

    DragonBonesJS is a runtime for the DragonBones 2D skeletal animation system, allowing developers to load and animate character rigs in JavaScript-based game engines like PixiJS and Egret.
    Downloads: 13 This Week
    Last Update:
    See Project
  • 4
    KafkaJS

    KafkaJS

    A modern Apache Kafka client for node.js

    KafkaJS is a modern Apache Kafka client for Node.js, designed to be simple, reliable, and fully featured, supporting the latest Kafka features.
    Downloads: 8 This Week
    Last Update:
    See Project
  • Premier Construction Software Icon
    Premier Construction Software

    Premier is a global leader in financial construction ERP software.

    Rated #1 Construction Accounting Software by Forbes Advisor in 2022 & 2023. Our modern SAAS solution is designed to meet the needs of General Contractors, Developers/Owners, Homebuilders & Specialty Contractors.
    Learn More
  • 5
    iOS Runtime for NativeScript

    iOS Runtime for NativeScript

    NativeScript for iOS using JavaScriptCore

    ios-jsc is a JavaScriptCore framework for iOS, utilized by NativeScript to execute JavaScript code within iOS applications. It provides a high-performance JavaScript engine that enables the execution of JavaScript in a native iOS environment.
    Downloads: 7 This Week
    Last Update:
    See Project
  • 6
    ReNative

    ReNative

    Unified Development Platform for iOS, tvOS, Android, Android TV

    ReNative allows you to bootstrap, develop and deploy apps for mobile, web, TVs, desktops, consoles, wearables, and more via a single development environment. ReNative supports standard community-driven react-native plugins you can use to enhance the functionality of your apps. ReNative allows you to build powerful multi-platform bootstrap templates. ReNative supports integrations for various services and deployment infrastructures for your apps. Tired of setting up and managing countless various projects? you can go as simple as a most basic JSON config file to get yourself up and running. Sometimes you need to extend CLI functionality with custom build scripts. ReNative makes this easy for you. ReNative runtime is an NPM dependency to help abstract away some of the complexities of building UI interfaces and features for a large number of target platforms and devices.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 7
    Boa

    Boa

    Embeddable and experimental Javascript engine written in Rust

    This is an experimental Javascript lexer, parser and interpreter written in Rust. Currently, it has support for some of the language.
    Downloads: 5 This Week
    Last Update:
    See Project
  • 8
    Just JavaScript

    Just JavaScript

    the only javascript runtime to hit no.1 on techempower

    The only javascript runtime to hit no.1 on techempower.
    Downloads: 5 This Week
    Last Update:
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  • 9
    Lightning Web Components

    Lightning Web Components

    A Blazing Fast, Enterprise-Grade Web Components Foundation

    Lean, lightweight runtime optimized for performance, with minimal boilerplate code. Lightning Web Components uses standard HTML, modern JavaScript (ES6+), and the best of native Web Components. Leave abstractions behind and build custom elements with HTML, JavaScript, and CSS. Lightning web components are custom elements built using HTML and modern JavaScript. Ready to learn more? Check out the Developer Guide and write code in the Playground. You’ll be up and running in no time. Create fast, versatile web components and apps using the stack and tools your team prefers. Shape the framework through your pull requests and help push native Web Components forward. Use the latest web standards to build robust components that run in modern browsers and IE 11. Follow the instructions in your terminal. For Select a type of project, choose Single Page App and choose LWC as the variant.
    Downloads: 4 This Week
    Last Update:
    See Project
  • The full-stack observability platform that protects your dataLayer, tags and conversion data Icon
    The full-stack observability platform that protects your dataLayer, tags and conversion data

    Stop losing revenue to bad data today. and protect your marketing data with Code-Cube.io.

    Code-Cube.io detects issues instantly, alerts you in real time and helps you resolve them fast. No manual QA. No unreliable data. Just data you can trust and act on.
    Learn More
  • 10
    JerryScript

    JerryScript

    Ultra-lightweight JavaScript engine for the Internet of Things

    JerryScript is a lightweight JavaScript engine for resource-constrained devices such as microcontrollers. It can run on devices with less than 64 KB of RAM and less than 200 KB of flash memory.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 11
    BeepBeep
    Lightweight runtime monitor for AJAX web applications that checks in real time whether XML messages received and sent by the application satisfy a predefined interface specification. Complex message sequences and data values are supported.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    ChakraCore

    ChakraCore

    ChakraCore is an open source Javascript engine with a C API

    ChakraCore is a JavaScript engine with a C API you can use to add support for JavaScript to any C or C compatible project. It can be compiled for x64 processors on Linux macOS and Windows. And x86 and ARM for Windows only. It is a future goal to support x86 and ARM processors on Linux and ARM on macOS. As you may have heard Microsoft Edge no longer uses Chakra. Microsoft will continue to provide security updates for ChakraCore 1.11 until 9th March 2021 but do not intend to support it after that. ChakraCore is planned to continue as a community project targeted primarily at embedded use cases. We hope to produce future releases with new features and enhancements to support such use cases. You can build ChakraCore on Windows 7 SP1 or above, and Windows Server 2008 R2 or above, with either Visual Studio 2015 or 2017 with C++ support installed.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    NativeScript iOS

    NativeScript iOS

    NativeScript for iOS and visionOS using V8

    The nativescript-ios repository contains the runtime and core modules necessary for building and running NativeScript applications on iOS devices, enabling developers to create native iOS apps using JavaScript or TypeScript.
    Downloads: 0 This Week
    Last Update:
    See Project
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