Open Source JavaScript Software - Page 71
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JavaScript Software
Browse free open source JavaScript Software and projects below. Use the toggles on the left to filter open source JavaScript Software by OS, license, language, programming language, and project status.
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$300 Free Credits to Build on Google CloudPut your $300 in credit toward real workloads, then keep building with free monthly usage for 20+ products. No commitment and no charge until you upgrade.
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Cut Data Warehouse Costs by 54%BigQuery delivers 54% lower TCO with exabyte scale and flexible pricing. Free migration tools handle the SQL translation automatically.
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JSONCrush
Compress JSON into URL friendly strings
This simple system allows for excellent compression of uri encoded JSON strings using the JSCrush algorithm. -
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JSUI
A powerful UI toolkit for managing JavaScript apps
A tool for visually organizing, creating and managing JavaScript projects. The framework and stack don't matter. If the project has a package.json, it belongs here. Run scripts, manage dependencies, apply plugins, generate new files, and kill all node processes. Import existing projects. Manage and organize projects in groups. Collapse, rename or delete groups. Mark a project with a red border if it's not using Git yet. Open the project in Finder. Open the project in your editor of choice (configurable in Settings). Quick preview of package.json. Open the GitHub/Bitbucket/GitLab page for the project. Start the project. Remove the project from the dashboard. The scripts run in an integrated Terminal that supports multiple tabs so you can see the output, or you can minimize it if you don't care. -
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James
Web Debugging Proxy Application
James is an HTTP Proxy and Monitor that enables developers to view and intercept requests made from the browser. It is an open-source alternative to the popular developer tool Charles. James is built with hoxy, electron and react. Use wildcards in the "url to map" field, put a "*" between two adjacent slashes. The electron instance will automatically reload whenever a change is made. Download the correct version for your OS. -
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JanusWeb
An in-browser implementation of JanusVR
JanusXR re-imagines webpages as collaborative 3D web spaces interconnected by portals. JanusXR turns any webpage into its own three-dimensional space where users can meet and explore with others. Host content on the open web and customize Janus' open-source multiplayer server to fit your needs. VESTA is JanusXR's user-driven community. Post your own spaces and get feedback from other community members! The built-in editor allows users to join together to create content in real-time. JanusWeb's widget generator allows you to embed a 3D WebVR portal to your webspace into any 2D webpage. With the JanusXR Youtube translator, watching videos with friends is a walk in the park. Oculus Rift, Vive, GearVR, Daydream, and Cardboard support via WebVR API. Realtime collaboration across all devices via built-in networking. There are several different ways to use JanusWeb, depending on how much control you want to have over the whole system. -
Host LLMs in Production With On-Demand GPUsDeploy your model, get an endpoint, pay only for compute time. No GPU provisioning or infrastructure management required.
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Jasny Bootstrap
The missing components for your favorite front-end framework
Jasny Bootstrap is an extension to vanilla Bootstrap, adding a number of features and components. The aim of Jasny Bootstrap is to provide all the required features for building highly interactive web applications for desktop and mobile. As of version 3.1.0 Jasny Bootstrap is no longer bundled with vanilla Bootstrap. You should load vanilla Bootstrap's CSS before this extension. Jasny Bootstrap has a few easy ways to quickly get started, each one appealing to a different skill level and use case. Read through to see what suits your particular needs. The fastest way to get Jasny Bootstrap is to download the compiled and minified versions of our CSS and JavaScript. No documentation or original source files are included. Get the latest Jasny Bootstrap LESS and JavaScript source code by downloading it directly from GitHub. Visit us on GitHub to clone or fork the Jasny Bootstrap project. -
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JavaGuide
"Java Learning + Interview Guide" covers the core Java knowledge
JavaGuide is an open source knowledge base and learning resource for Java developers, created and maintained by Snailclimb. The project organizes and explains a wide range of Java-related concepts, from language fundamentals to advanced topics such as concurrency, JVM internals, distributed systems, and high availability design. It is especially popular among developers preparing for technical interviews, as it compiles common knowledge points, detailed explanations, and source code analyses that interviewers frequently explore. The repository also includes sections on computer science basics such as operating systems, networks, and data structures, along with practical guides for databases, Redis, MySQL, and MongoDB. Beyond core Java, JavaGuide covers tools like Maven, Docker, Git, and frameworks like Spring, Spring Boot, and MyBatis. Its structured approach makes it a comprehensive handbook for both beginners and experienced backend engineers. -
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JavaScript Algo and Data Structures
Algorithms and data structures implemented in JavaScript
javascript-algorithms is an open source repository by Oleksii Trekhleb that provides implementations of algorithms and data structures in JavaScript. Each algorithm includes explanations, complexity analysis, and references for further reading, making it both a coding resource and a study guide. The repository covers topics such as sorting, searching, graph algorithms, cryptography, and data structures like linked lists, stacks, and queues. It is designed to help developers understand algorithm fundamentals and practice problem-solving with JavaScript. Multilingual README files make the resource accessible to a global audience. With strong community engagement, it is one of the most popular algorithm repositories on GitHub. -
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JavaScript30
30 Day Vanilla JS Challenge
JavaScript30 is an open source repository created by Wes Bos that provides a 30-day coding challenge to help developers strengthen their vanilla JavaScript skills. It includes starter files and completed solutions for each daily project, covering a wide range of practical exercises like clocks, video players, geolocation apps, and more. The challenge avoids frameworks and libraries, focusing purely on core JavaScript. Each project introduces hands-on coding tasks that reinforce DOM manipulation, events, APIs, and browser features. The repository also encourages learners to share their own solutions and improvements, fostering a strong community around the challenge. With its incremental structure, it’s a popular resource for building confidence and fluency in JavaScript. -
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Jekyll Admin
Jekyll plugin that provides users with a traditional CMS interface
A Jekyll plugin that provides users with a traditional CMS-style graphical interface to author content and administer Jekyll sites. The project is divided into two parts. A Ruby-based HTTP API that handles Jekyll and filesystem operations, and a Javascript-based front end, built on that API. The plugin allows you to customize the name of a collection that is displayed in the sidebar by defining it in the collection's metadata in the config file. For example, if your source's posts are actually news-items on the deployed site, then it can be distracting to see the label Posts in the admin's sidebar. -
MongoDB Atlas runs apps anywhereMongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
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JsStore
A complete IndexedDB wrapper with SQL like syntax
Execute Database operation in browsers with JsStore. JsStore is an indexedDB wrapper. It makes IndexedDB super easy with its SQL-like APIs. Harness the power of JsStore to streamline database operations in your web applications. With its SQL-like API, JsStore simplifies IndexedDB interactions, enabling developers to easily query, filter, and manipulate data with familiar syntax and efficiency. -
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Jupyter Nbextensions Configurator
A jupyter notebook serverextension providing config interfaces
A server extension for jupyter notebook which provides configuration interfaces for notebook extensions (nbextensions). The jupyter_nbextensions_configurator jupyter server extension provides graphical user interfaces for configuring which nbextensions are enabled (load automatically for every notebook). In addition, for nbextensions which include an appropriate yaml descriptor file (see below), the interface also renders their markdown readme files, and provides controls to configure the nbextensions' options. -
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Kendo UI Core
An HTML5, jQuery-based widget library for building modern web apps
Kendo UI is everything you need to build sites and apps with HTML5 & JavaScript. Kendo UI Core is the free and open-source version of Kendo UI that provides access to the web's best UI widgets and key framework features, essential for developing great experiences for the web and mobile. Kendo UI Core is a free and open-source subset of Kendo UI. The following table details the widgets and features available in Kendo UI Core, as well as the additional features available via a commercial Kendo UI license. -
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KeystoneJS
Node.js CMS and web app framework
KeystoneJS is an open source framework for developing database-driven websites, applications and APIs in Node.js. Built on Express and MongoDB. Keystone will configure express - the de facto web server for node.js - for you and connect to your MongoDB database using Mongoose, the leading ODM package. Keystone starts with best practices for setting up your MV* application, and makes it easy to manage your templates, views and routes. IDs, Strings, Booleans, Dates and Numbers are the building blocks of your database. Keystone builds on these with useful, real-world field types like name, email, password, address, image and relationship fields (and more). Whether you use it while you're building out your application, or in production as a database content management system, Keystone's Admin UI will save you time and make managing your data easy. Sometimes, async code can get complicated to do simple things. -
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Kibana
Your window into the Elastic Stack
Kibana is a analytics and search dashboard for Elasticsearch that allows you to visualize Elasticsearch data and efficiently navigate the Elastic Stack. With Kibana you can visualize and shape your data simply and intuitively, share visualizations for greater collaboration, organize dashboards and visualizations, and so much more. -
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LIEF
LIEF - Library to Instrument Executable Formats (C++, Python, Rust)
LIEF (Library to Instrument Executable Formats) is a cross-platform library that enables parsing, modifying, and abstracting executable formats such as ELF, PE, and Mach-O. It's widely used in reverse engineering and binary analysis. -
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Learning Prompt
Free prompt engineering online course
Learning-Prompt is a curated repository of prompts, techniques, and instructional patterns designed to help people construct better prompts for AI systems, including generation, reasoning, and debugging tasks. It collects examples of effective prompt formats, chains of thought, strategy scaffolds, and comparative methods that help yield consistent, high-quality results. The project also includes meta-guidance: reflections on prompt failures, tips for prompt tuning, ways to mitigate model bias or misinterpretation, and how to adapt prompts for different AI capabilities. Because prompt design is a skill under continuous iteration, the repo encourages contributions of new prompt recipes, evaluations, and domain-specific adaptations. It’s intended for educators, developers, and prompt engineers who want a living toolkit rather than static advice. Over time it serves as both a reference and playground for emergent prompt techniques. -
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List.js
Library for adding search, sort, filters and flexibility to tables
Tiny, invisible and simple, yet powerful and incredibly fast vanilla JavaScript that adds search, sort, filters and flexibility to plain HTML lists, tables, or anything. List.js can be used in three different ways. It can be on existing HTML, it can create it's own HTML or a combination of both methods. Works both lists, tables and almost anything else. E.g. <div>,<ul>,<table>, etc. Simple templating system that adds possibility to add, edit, remove items. Perfect library for adding search, sort, filters and flexibility to tables, lists and various HTML elements. Built to be invisible and work on existing HTML. Simple and invisible. Easy to apply to existing HTML. No dependencies. Fast, and tiny (5KB minified&gzip). It can handle thousands of items. It is easy to add search input and sort buttons with just a few classes and attributes in your HTML. ‘Automagical’ because List.js registers the event handlers, searches/sorts and updates the list for you. -
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Logger for Redux
Logger for Redux
Logger for Redux. Now maintained by LogRocket! LogRocket is a production Redux logging tool that lets you replay problems as if they happened in your own browser. Instead of guessing why errors happen or asking users for screenshots and log dumps, LogRocket lets you replay Redux actions + state, network requests, console logs, and see a video of what the user saw. Transform action before print. Eg. convert an Immutable object to plain JSON. Transform state before print. Eg. convert an Immutable object to plain JSON. -
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Lovefield
Lovefield is a relational database for web apps
Lovefield is a relational database for web applications implemented in JavaScript, offering a SQL-like query builder that runs entirely in the browser. It provides a typed schema system, indices, and a declarative API that compiles to efficient execution plans over IndexedDB (and other storage backends where available). Queries support joins, aggregations, ordering, pagination, and predicates, enabling complex client-side data operations with transactional semantics. The engine includes a cost-based optimizer and a planner that chooses index scans and join orders to reduce latency. Because it is embedded, apps can keep responsive, offline-capable experiences while synchronizing with a server on their own schedule. The library targets maintainable, testable data logic by abstracting away browser storage quirks behind a stable relational façade. -
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MCP JetBrains
A model context protocol server to work with JetBrains IDEs
The JetBrains MCP Server is a Model Context Protocol (MCP) server designed to integrate seamlessly with JetBrains IDEs such as IntelliJ, PyCharm, WebStorm, and Android Studio. It facilitates enhanced communication between Large Language Models (LLMs) and the development environment, enabling AI-driven code assistance and automation. -
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MCP OpenAI
Chat with OpenAI models from Claude Desktop
The MCP OpenAI Server is a Model Context Protocol server that allows seamless interaction with OpenAI's models directly from applications like Claude Desktop. It simplifies the integration of OpenAI's language models into various workflows. -
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MCP Server Amazon Bedrock
Model Context Procotol(MCP) server for using Amazon Bedrock
The Amazon Bedrock MCP Server is an MCP server that integrates with Amazon Bedrock's Nova Canvas model for AI image generation. It allows users to generate high-quality images from text descriptions using Amazon's AI capabilities. -
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MCP Server Playwright
MCP server for browser automation using Playwright
An MCP (Model Context Protocol) server that leverages Playwright to provide browser automation capabilities, enabling large language models (LLMs) to interact with web pages, take screenshots, and execute JavaScript within a real browser environment. -
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MCP WebResearch
MCP web research server (give Claude real-time info from the web)
The MCP Web Research Server is a Model Context Protocol server designed to bring real-time web information into AI applications like Claude, facilitating efficient research on any topic. -
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MCP YouTube
A Model-Context Protocol Server for YouTube
The YouTube MCP Server uses yt-dlp to download subtitles from YouTube videos and connects to claude.ai via the Model Context Protocol. It enables AI assistants to summarize YouTube videos by accessing their subtitles.
