Open Source JavaScript Software - Page 33
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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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Generative AI for Beginners (Version 3)
21 Lessons, Get Started Building with Generative AI
Generative AI for Beginners is a 21-lesson course by Microsoft Cloud Advocates that teaches the fundamentals of building generative AI applications in a practical, project-oriented way. Lessons are split into “Learn” modules for core concepts and “Build” modules with hands-on code in Python and TypeScript, so you can jump in at any point that matches your goals. The course covers everything from model selection, prompt engineering, and chat/text/image app patterns to secure development practices and UX for AI. It also walks through modern application techniques such as function calling, RAG with vector databases, working with open source models, agents, fine-tuning, and using SLMs. Each lesson includes a short video, a written guide, runnable samples for Azure OpenAI, the GitHub Marketplace Model Catalog, and the OpenAI API, plus a “Keep Learning” section for deeper study. -
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Get Shit Done
A light-weight and powerful meta-prompting, context engineering
Get Shit Done is a high-impact, open-source meta-prompting and spec-driven development system designed to streamline building software with AI assistants like Claude Code, OpenCode, and Gemini CLI. It solves “context rot” — the degradation of AI quality as a chat session grows — by structuring your idea into precise, context-engineered steps that are researched, scoped, planned, executed, and verified with clear commands and outputs instead of ad-hoc prompts. The project emphasizes simplicity and effectiveness over bureaucratic workflows like story points, sprint ceremonies, or enterprise processes, making it especially useful for solo developers or small teams aiming to get reliable execution without overhead. GSD breaks down big goals into atomic plans, keeps AI context fresh, and automates task execution while generating standardized documentation, roadmaps, and commit histories. -
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GitHub Dark
Dark GitHub style
GitHub-Dark is a userstyle that transforms GitHub’s interface into a coherent dark theme, covering repositories, issues, pull requests, gists, and profile pages. Distributed as a CSS stylesheet intended for the Stylus browser extension, it applies a comprehensive palette, rebalances contrast, and refines syntax colors for code views to ensure readability in low-light settings. The project goes beyond simple inversion by thoughtfully adjusting backgrounds, borders, badges, and diff highlights so the UI feels native rather than “flipped.” It includes targeted fixes for edge cases across GitHub’s many subpages, aiming for consistency while preserving the information hierarchy of the original design. Users can apply the theme selectively, override variables, or combine it with other userstyles to fit personal preference. Even with GitHub’s own theme options, GitHub-Dark remains a carefully tuned alternative for people who want a specific aesthetic or more granular control. -
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GitHub Isometric Contributions extension
Browser extension for rendering isometric pixel art charts
This is a browser extension for Chrome/Brave and Firefox that lets you toggle between your regular GitHub contribution chart and an isometric pixel art version. It uses obelisk.js for isometric graphics. Besides being sort of neat looking, this view is interesting in that it highlights the differences between the number of contributions with more granularity. This isn't meant to completely replace the standard 2D graph though, because in most ways it is actually less useful. For example, there are no axis labels, shorter bars can be hidden behind taller ones, you can't hover over a bar to see the day and count, etc. If you want to hack on the extension, you'll need to install it manually. First clone or fork this repo. Then, on your Chrome Extensions page, make sure "Developer mode" is checked. You can then click the "Load unpacked extension" button and browse to the src directory of this repo. -
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Google Style Guides
Style guides for Google-originated open source projects
Google Styleguide is a comprehensive collection of coding style guides created and maintained by Google to ensure consistency, readability, and maintainability across its vast array of software projects. These guides define best practices and conventions for writing code in multiple programming languages, from C++ and Python to JavaScript, Go, and Swift. By adhering to these standards, developers can more easily collaborate, review code, and maintain high-quality software across teams and open source contributions. Each guide covers a wide range of topics, including naming conventions, file organization, indentation, documentation, and usage of specific language features. The repository also provides supplementary resources such as an Emacs configuration file for Google’s C++ style and references to related guidelines like Effective Dart and Kotlin Style Guide. -
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HUSTOJ
Popular Open Source Online Judge based on PHP/C++/MySQL/Linux
Popular Open Source Online Judge based on PHP/C++/MySQL/Linux for ACM/ICPC and NOIP training, with easy installation. Open source OJ system. HUSTOJ is free software under the GPL. (Only the original part of the code, which uses components from other open-source projects, please follow the agreement of the original component.) Because the web terminal/database/judgment machine are all packaged in the same image and cannot be extended, it is not recommended to use this image for distributed judgment. In addition, please do not use the SHM file system in Docker, it will be unable to mount due to insufficient memory space The sandbox environment causes inexplicable runtime errors. The default location of script installation is /home/judge, where src is all source code, data is test data, etc directory is the configuration file of the judgment side, and the install directory is various tool scripts. -
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Highlight.js
JavaScript syntax highlighter with language auto-detection
Highlight.js is a syntax highlighter written in JavaScript. It works in the browser as well as on the server. It can work with pretty much any markup, doesn’t depend on any other frameworks, and has automatic language detection. Highlight.js supports over 180 languages in the core library. There are also 3rd party language definitions available to support even more languages. We strongly recommend <pre><code> wrapping for code blocks. It's quite semantic and "just works" out of the box with zero fiddling. It is possible to use other HTML elements (or combos), but you may need to pay special attention to preserving linebreaks. You can run highlighting inside a web worker to avoid freezing the browser window while dealing with very big chunks of code. -
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Hugo PaperMod
A fast, clean, responsive Hugo theme
PaperMod is a fast, minimal-yet-featureful theme for the Hugo static site generator, aimed at blogs, documentation sites, and personal pages. It focuses on clean typography, responsive layouts, and sensible defaults, while exposing a large set of front-matter and config options. Built-in features include dark/light modes, archive and taxonomy views, reading-time indicators, breadcrumbs, and an optional profile/landing layout. Client-side search, code highlighting, social links, and comment integrations can be enabled with simple configuration, avoiding custom JavaScript for most needs. The theme ships with SEO-friendly meta tags, Open Graph/Twitter cards, and RSS feeds to improve discoverability. Because it’s engineered for speed—lean HTML, minimized assets, and Hugo’s native rendering—it delivers excellent performance scores out of the box. -
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Hybrid Browser
A p2p browser, browse the p2p networks along with the regular net
Browse the p2p networks, and create and view p2p websites. It means you will be able to interact with p2p networks and view the p2p data on the browser. You will be able to create and upload p2p websites. This makes it possible to create fully peer-to-peer websites, no middlemen and no servers. -
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Hypackel Engine
JavaScript-based game engine designed to empower developers
Hypackel Engine is a JavaScript-based 2D game engine designed to provide beginner-friendly tools for creating simple games such as platformers, RPGs, and top-down shooters. It focuses on accessibility by offering a lightweight and easy-to-integrate script that developers can import directly into web-based projects. The engine includes built-in systems for handling physics, collisions, rendering, and animation, allowing developers to focus more on gameplay logic rather than low-level implementation details. Its architecture is structured around modular systems like sprites, particles, and audio, which can be controlled through simple function calls and arrays. The project emphasizes simplicity and rapid prototyping, making it suitable for educational purposes or small-scale game development. It also includes example files and documentation to guide users through setup and usage. Overall, HYPACKEL-ENGINE-1 serves as an entry-level framework for experimenting with game development. -
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Hyperapp
Tiny framework for building hypertext applications
The tiny framework for building hypertext applications. Do more with less—We have minimized the concepts you need to learn to get stuff done. Views, actions, effects, and subscriptions are all pretty easy to get to grips with and work together seamlessly. Write what, not how—With a declarative API that's easy to read and fun to write, Hyperapp is the best way to build purely functional, feature-rich, browser-based apps in JavaScript. Smaller than a favicon—1 kB, give or take. Hyperapp is an ultra-lightweight Virtual DOM, highly-optimized diff algorithm, and state management library obsessed with minimalism. Official packages provide access to The Web Platform, and ensure that the APIs are exposed in a way that makes sense for Hyperapp, and the underlying code is stable. We already cover a decent amount of features, but you can always create your own effects and subscriptions if something is not available yet. -
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IGdm Messenger
Desktop application for Instagram DMs
Multi-platform Desktop application for Instagram DMs, built with electron Build Status! To setup this project locally for development purposes please follow the following steps. Ensure you Node.js installed. Clone this repo by running the command - git clone. Navigate to the directory where the repo is cloned to. (e.g cd igdm). Run npm install to install all the dependencies. Start the application locally by running npm start. -
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Infoooze
A OSINT tool which helps you to quickly find information effectively.
infoooze is an open-source information-gathering tool for cybersecurity and OSINT (Open-Source Intelligence) purposes. It automates the process of collecting public data about domains, emails, IP addresses, and more. -
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Intermock
Mocking library to create mock objects with fake data for TypeScript
Intermock is a TypeScript utility developed by Google that automatically generates mock objects and JSON data for TypeScript interfaces using the Faker library. It simplifies frontend and API testing by creating realistic, schema-compliant mock data directly from interface definitions, eliminating the need for manual mock creation. Intermock supports a wide range of TypeScript constructs including interfaces, unions, generics, mapped types, and tuples, ensuring comprehensive type coverage. It can be used both via a command-line interface (CLI) and programmatically through its API, making it suitable for integration into build pipelines or development environments. The tool also allows fine-grained control over output format—object, JSON, or string—and supports JSDoc annotations to define custom Faker data generators. By leveraging Intermock, developers can quickly generate realistic mock datasets for testing, prototyping, and documentation purposes without writing boilerplate code. -
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JS Beautifier
Beautifier for javascript
This little beautifier will reformat and re-indent bookmarklets, ugly JavaScript, unpack scripts packed by Dean Edward’s popular packer, as well as partly deobfuscate scripts processed by the npm package javascript-obfuscator. All of the source code is completely free and open, available on GitHub under MIT licence, and we have a command-line version, python library and a node package as well. You may install the NPM package js-beautify. When installed globally, it provides an executable js-beautify script. As with the Python script, the beautified result is sent to stdout unless otherwise configured. You can also use js-beautify as a node library (install locally, the npm default). The beautifier can be added on your page as web library. JS Beautifier is hosted on two CDN services: cdnjs and rawgit. You can beautify javascript using JS Beautifier in your web browser, or on the command-line using node.js or python. -
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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. -
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Jasmine
A JavaScript Testing Framework
Jasmine is a behavior-driven JavaScript development framework for running both browser and Node.js tests. It’s been tested to work on most versions of popular browsers including Safari, Chrome, Firefox, and Internet Explorer. Jasmine does not rely on any other JavaScript frameworks, browsers or DOM, making it suitable for websites, Node.js projects, or just about anywhere that JavaScript can run. Jasmine has everything you need out of the box to test your code, yet retains a low overhead and absolutely no external dependencies. This means, of course, that it is fast. It has a clean, obvious syntax that makes writing tests a breeze. -
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Jitsi Meet
Secure, simple and scalable video conferences application
Go ahead, video chat with the whole team. In fact, invite everyone you know. Jitsi Meet is a fully encrypted, 100% open source video conferencing solution that you can use all day, every day, for free — with no account needed. Head over to meet.jit.si and see the service in action before you decide whether you’d like to run your own instance. For those interested, check out the meet.jit.si terms of service and privacy policy. Yep, it’s free — and it’s technologically advanced, too. In fact, Jitsi Meet sounds better, thanks to HD audio with Opus; is anonymous, no need for an account, ever! It also keeps conversations private with encryption by default (and advanced security settings) and is developer-friendly, modify and customize it to your heart’s content. It’s 100% open source. Trade messages and emojis while you video conference, with integrated chat. -
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KeepChatGPT
Browser userscript that enhances ChatGPT reliability and usability
KeepChatGPT is an open source browser userscript designed to enhance the reliability, usability, and efficiency of the ChatGPT web interface. It runs through userscript managers and injects additional functionality directly into the page, allowing users to improve their workflow without requiring a backend service or separate application. It focuses on solving common problems experienced during AI conversations, such as session timeouts, network errors, message failures, and interruptions during long chats. By automating session refresh and maintaining active connections, KeepChatGPT reduces the need for repeated manual steps when recovering from errors or expired sessions. KeepChatGPT also introduces a variety of enhancements that improve the overall interface and user experience, including page cleanup, expanded display layouts, conversation cloning, and detailed chat information. -
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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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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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Knex
A query builder for PostgreSQL, MySQL, CockroachDB, SQL Server, etc.
Knex.js is a flexible and portable SQL query builder for JavaScript. It supports multiple database systems, including PostgreSQL, MySQL, SQLite3, and more. Knex.js offers a powerful and intuitive API for building and executing SQL queries, making it a popular choice for Node.js applications requiring database interactions. -
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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. -
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Koala
Koala is a GUI application for less
Koala is a GUI application for Less, Sass, Compass and CoffeeScript compilation, to help web developers to use them more efficiently. Koala can run in Windows, Linux and Mac. Listening files, compile automatically when the file changes, that everything is running in the background without user action. Support set the compiler options for each file. If encountered an error during compilation, koala will pop up the error message. Support for the project to create a global configuration set the same compiler options for the files. koala is built with node-webkit. node-webkit is an app runtime based on Chromium and node.js. You can write native apps in HTML and Javascript with node-webkit. Listens to files, compiles automatically when file changes occur. Everything runs in the background without the need for user input. -
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LBRY App
Browser and wallet for LBRY, the decentralized, user-controlled
LBRY is a free, open, and community-run digital marketplace. Build the future of content freedom. What if anyone in the world could publish a piece of digital content, anyone else in the world could access it, for free or for payment, and that entire system worked end-to-end without any centralized authority or point of control? Looking for API documentation, formal specifications, how-tos, resources, or the meaning of life? Find at least some of these things in the resources area. No matter your experience or skill level, you can progress content freedom. This repo contains the UI code that powers the official LBRY desktop app. The LBRY app is a graphical browser for the decentralized content marketplace provided by the LBRY protocol. It is essentially the lbry daemon bundled with a UI using Electron.