Open Source JavaScript Software - Page 41
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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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CSS Element Queries
High-speed element dimension/media queries in valid css
An event-based CSS element dimension query library with valid CSS selector syntax to change styles and allow responsive images based on element's dimensions and not window's viewport. Download the zip file using the buttons on the right side and include both files at the head section of your page. ElementQueries start automatically to listen to window.load event and parses all available css files to attach the ResizeSensor and start the magic. No interval/timeout detection like in most resize sensor out there. It's truly event-based. Automatically discovers new DOM elements. No need to call javascript manually. All CSS selectors available. It uses the normal attribute selector. Min-width, min-height, max-width and max-height supported. It works for all layout modifications, HTML (innerHTML etc), inline styles, DOM mutation, CSS3 transitions, fluid layout changes (parent changes too), pseudo classes (:hover etc), window resizes, etc. -
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CaptfEncoder
Captfencoder is a rapid cross platform network security tool suite
Captfencoder is a rapid cross-platform network security tool suite, providing network security-related code conversion, classical cryptography, cryptography, asymmetric encryption, miscellaneous tools, and aggregating all kinds of online tools. CaptfEncoder V3 develop by Rust, Executable programs are smaller, faster, better performing, and more powerful. CaptfEncoder V3 suport script extension. -
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Career-Ops
AI-powered job search system built on Claude Code
Career Ops is an open-source platform designed to help individuals manage their job search process with a structured, operations-style approach that treats career development like a pipeline. It provides a system for organizing job applications, tracking progress across different stages, and maintaining visibility into opportunities, much like a lightweight CRM tailored for job seekers. The project emphasizes clarity and accountability, enabling users to monitor applications, follow-ups, and outcomes in a centralized environment. It is typically built with modern web technologies, allowing for easy customization and self-hosting by developers who want full control over their data. Career Ops focuses on reducing the chaos and fragmentation that often comes with job searching by introducing a repeatable workflow that can be iterated and improved over time. It also supports the idea of data-driven job searching. -
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Cerebro
Open-source productivity booster with a brain
Cerebro is an open source electron-based productivity software that lets you search and see everything you need on your PC in one place. With just a few clicks you can search on your machine or on the internet everything you need; see everything you need without having to open another application; and easily find and use what you want. -
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Chalk
Terminal string styling done right
Chalk 5 is ESM. If you want to use Chalk with TypeScript or a build tool, you will probably want to use Chalk 4 for now. Chalk comes with an easy to use composable API where you just chain and nest the styles you want. Chain styles and call the last one as a method with a string argument. Order doesn't matter, and later styles take precedent in case of a conflict. This simply means that chalk.red.yellow.green is equivalent to chalk.green. Color support is automatically detected, but you can override it by setting the level property. You should however only do this in your own code as it applies globally to all Chalk consumers. Detect whether the terminal supports color. Used internally and handled for you, but exposed for convenience. chalkStderr contains a separate instance configured with color support detected for stderr stream instead of stdout. Override rules from supportsColor apply to this too. supportsColorStderr is exposed for convenience. -
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Cofounder
AI tool that generates full-stack web apps with generative UI systems
Cofounder is an experimental open source development tool designed to generate complete full-stack web applications using AI-assisted workflows. It focuses on creating applications that include a backend, database integration, and stateful web interfaces while also generating user interfaces through a generative UI system rooted in application architecture. Developers can describe a project and allow the system to incrementally produce a working codebase that includes both backend services and a modern web frontend built with a Vite and React setup. Cofounder also provides a dashboard and local API environment that helps manage project generation, iteration, and interaction with the system. Generated projects are stored locally and can be launched using standard development commands, allowing developers to run and modify the code that the system produces. Cofounder relies on configurable nodes and sequences that define how AI operations are executed. -
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Commander.js
node.js command-line interfaces made easy
The complete solution for node.js command-line interfaces. Commander exports a global object which is convenient for quick programs. For larger programs which may use commander in multiple ways, including unit testing, it is better to create a local Command object to use. Each option can have a short flag (single character) and a long name, separated by a comma or space or vertical bar ('|'). Multiple short flags may optionally be combined in a single argument following the dash: boolean flags, followed by a single option taking a value (possibly followed by the value). You may specify a function to do custom processing of option-arguments. The callback function receives two parameters, the user specified option-argument and the previous value for the option. It returns the new value for the option. This allows you to coerce the option-argument to the desired type, or accumulate values, or do entirely custom processing. -
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Complete Intro to React v6
learn React.js with Brian Holt
Complete Intro to React v6 is the course website and lesson repository for Brian Holt’s Frontend Masters React curriculum. It guides learners from plain React rendering through JSX, components, user input, hooks, effects, and custom hooks. The course then adds composition, routing, class state, error boundaries, context, portals, and refs. Intermediate sections examine Redux, code splitting, server-side rendering, Tailwind CSS, testing, and TypeScript migration. A separate companion repository provides incremental project snapshots for each major lesson. The material also covers supporting tools such as npm, Parcel, Babel, ESLint, Prettier, and browser development utilities. Because it reflects an earlier React ecosystem, it is best used as structured courseware rather than a current starter template. -
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Comprehensive Rust
This is the Rust course used by the Android team at Google
Comprehensive Rust is an open source training course developed by Google to provide a complete introduction to the Rust programming language. Originally created for Google engineers, it has since been released publicly for the broader developer community. The course is structured into modular lessons that cover the fundamentals of Rust, including ownership, lifetimes, traits, generics, and error handling, before progressing to advanced topics like concurrency, async programming, unsafe Rust, and FFI. It is designed to be taught in classroom settings but can also be followed independently, making it useful both for structured training and self-study. The materials are presented in a slide-based format with accompanying examples and hands-on exercises to reinforce key concepts. By offering an accessible yet thorough introduction, the course helps learners gain practical experience with Rust while building a strong understanding of its unique safety and performance guarantees. -
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Configure your Node.js Applications
Node.js application configuration
Node-config organizes hierarchical configurations for your app deployments. It lets you define a set of default parameters, and extend them for different deployment environments (development, qa, staging, production, etc.). Configurations are stored in configuration files within your application, and can be overridden and extended by environment variables, command line parameters, or external sources. This gives your application a consistent configuration interface shared among a growing list of npm modules also using node-config. config.get() will throw an exception for undefined keys to help catch typos and missing values. Use config.has() to test if a configuration value is defined. Running in this configuration, the port and dbName elements of dbConfig will come from the default.json file, and the host element will come from the production.json override file. -
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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. -
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Crypto Arbitrage
A cryptocurrency arbitrage opportunity calculator
A cryptocurrency arbitrage opportunity calculator and trading bot. Over 800 currencies and 50 markets. In short, it collects JSON from multiple different cryptocurrency markets, goes through the results, and finds the highest and lowest price for each coin. The script will find the highest price (chbtc.com), and lowest price (Bittrex), and divide the two: 51.8/38.23 = ~1.35 (~35% profit margin) and then push these results to the browser. It will also find the next highest market pairs, e.g. chbtc / jubi is the second-highest pair and chbtc/Bittrex the third, jubi/Bittrex the fourth and so on until every possible combination has been computed. Currently you will have to add a market object with the correct settings in the array markets, situated in the settings.js file. I am updating the project every day and this will change soon. You can temporarily stop loading a market from the frontend, or remove the market by deleting the object in settings.js. -
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Cytoscape.js
Graph theory library for visualization and analysis
A fully featured graph library written in pure JS. Permissive open source license (MIT) for the core Cytoscape.js library and all first-party extensions. Used in commercial projects and open-source projects in production. Designed for users first, for both frontfacing app usecases and developer usecases. Highly optimized. Compatible with All modern browsers. Legacy browsers with ES5 and canvas support. ES5 and canvas support are required, and feature detection is used for optional performance enhancements. Browsers circa 2012 support ES5 fully: IE10, Chrome 23, Firefox 21, Safari 6 (caniuse). Browsers with partial but sufficient ES5 support also work, such as IE9 and Firefox 4. The documentation and examples are not optimized for old browsers, although the library itself is. Some demos may not work in old browsers in order to keep the demo code simple. -
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DScan
Uploads the content to IPFS and generates decentralized QR codes
DScan is a decentralized storage and file sharing tool. DScan allows you to quickly upload files as well as folders to IPFS by using web3.storage and receive a "decentralized QR code" with IPFS CID. Later you can customize and share the QR code or hosted gateway link with everyone for easy and decentralized file sharing. Because of web3.storage, the content can be accessed over IPFS without the user installing and setting up a local instance of Kubo. -
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Dashy
A self-hostable personal dashboard built for you
Dashy is an open-source, highly customizable, easy-to-use, privacy-respecting dashboard app. With tons of built-in themes to choose form, plus a UI color palette editor, you can have a unique-looking dashboard in no time. There is also support for custom CSS, and since all properties use CSS variables, it is easy to override. Dashy can auto-fetch icons from the favicon of each of your apps/ services. There is also native support for Font Awesome, Material Design Icons, emoji icons and of course normal images. Get an instant overview of the health of each of your apps with status indicators. Once enabled, a small dot next to each app will show weather it is up and online, with more info like response time visible on hover. Need to protect your dashboard, the simple auth feature is super quick to enable, and has support for multiple users with granular controls. Dashy also has built-in support for Keycloak and other SSO providers. -
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Day.js
Fast, immutable 2kB alternative to Moment.js with the same modern API
Day.js is a fast, immutable, minimalist JavaScript library for parsing, validating, manipulating, and displaying dates and times for modern browsers. Its API is largely compatible with that of Moment.js, so if you know how to use Moment.js you’ll know how to use Day.js. Why opt for Day.js? Because it’s at just 2kB it involves less JavaScript to download, parse and execute, and more time for your code. Day.js is also immutable, chainable and has great support for internationalization. It currently supports all browsers. -
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Deep Chat
Customizable AI chat component for websites with API support
Deep Chat is a highly customizable web component designed to simplify the integration of AI-powered chat interfaces into websites. It allows developers to embed a fully functional chatbot using minimal setup, while still offering extensive control over behavior, appearance, and integrations. Deep Chat supports connections to a wide range of AI services as well as custom backends, enabling flexible deployment for different use cases. It is built as a framework-agnostic solution, meaning it can work across various frontend environments, with additional support provided for React through a dedicated wrapper. Deep Chat includes advanced interaction capabilities such as speech input and output, file handling, and multimedia communication, making it suitable for rich conversational experiences. Internally, it uses a structured architecture that manages input, message handling, and service communication, allowing developers to intercept and customize requests and responses. -
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Deep Research
Use any LLMs (Large Language Models) for Deep Research
Deep Research is a local-first research agent that orchestrates multiple LLMs to generate in-depth reports in minutes. It combines “thinking” and “task” model roles with live internet access to plan, search, read, and synthesize findings into structured outputs. The project emphasizes privacy: processing and storage happen locally, avoiding server-side retention of your queries and notes. A simple web UI lets you enter topics and configure models, while the backend streams progress as sources are fetched and arguments are weighed. It offers MCP server support and SSE APIs, so IDEs and agent clients can drive the same workflow programmatically. The result is a repeatable process for scoping questions, collecting evidence, and producing a concise report with citations and reasoning steps. -
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Desktop Commander MCP
AI-powered MCP server for desktop file and terminal automation
Desktop Commander MCP is an advanced Model Context Protocol server designed to extend AI assistants with direct control over a user’s local machine, including the file system and terminal. It integrates with clients like Claude Desktop to enable AI-driven workflows such as editing files, executing commands, and automating development tasks from a single conversational interface. Desktop Commander MCP builds on top of an MCP filesystem server and enhances it with powerful search, replace, and code editing capabilities tailored for real-world development environments. It allows users to run terminal commands with streaming output, manage long-running processes, and even execute code in memory without saving files. It also supports working with structured and document formats such as Excel, PDF, and DOCX, enabling AI to read, modify, and generate these files directly. -
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Dillinger
The last Markdown editor, ever
Dillinger is a cloud-enabled, mobile-ready, offline-storage compatible, AngularJS-powered HTML5 Markdown editor. Markdown is a lightweight markup language based on the formatting conventions that people naturally use in email. The overriding design goal for Markdown's formatting syntax is to make it as readable as possible. The idea is that a Markdown-formatted document should be publishable as-is, as plain text, without looking like it's been marked up with tags or formatting instructions. Dillinger uses a number of open source projects to work properly. Dillinger uses Gulp + Webpack for fast developing. Make a change in your file and instantaneously see your updates! Dillinger is very easy to install and deploy in a Docker container. -
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Discord Music Bot
An advanced discord music bot, supports Spotify, Soundcloud, YouTube
An advanced discord music bot, that supports Spotify, Soundcloud, and YouTube with Shuffling, Volume Control, and Web Dashboard with Slash Commands support! Discord.js v13 will break this bot so do not use this with it. We have been started working on v5 which will be out in some days/months with new features and much more are on the way. -
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Docusaurus
Easy to maintain open source documentation websites
Docusaurus is a project that makes maintaining, building and deploying open source documentation websites incredibly easy. Simple to set up and start, Docusaurus allows you to save time and focus on your documentation. All you have to do is write docs and blog posts with Markdown and Docusaurus will handle the rest of the website build process. Docusaurus comes with pre-configured localization, as well as all the key pages and sections you need to get started. It’s also customizable, so you can have a site that is uniquely yours. -
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Domain Digger
Domain analysis toolkit for DNS, IP, and WHOIS lookups
Domain Digger is an open source toolkit designed to help users analyze and explore domain-related information in a structured and visual way. It provides a centralized interface for investigating various technical details associated with a domain, including DNS records, IP information, and WHOIS data. By combining several domain intelligence features into a single platform, it simplifies the process of gathering and understanding domain infrastructure details. Domain Digger presents domain information through organized views and visual components, making it easier to interpret relationships between domains, DNS records, and network addresses. This can be useful for developers, security researchers, system administrators, and anyone working with domain infrastructure. Domain Digger aims to streamline domain analysis workflows by offering quick lookups and consolidated data sources in one environment. -
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EJS
Embedded JavaScript templates for node
EJS is a templating engine for JavaScript/Node.js that allows developers to embed plain JavaScript code into HTML markup. The idea is to avoid introducing a separate DSL for templating and instead use familiar JavaScript logic inside template tags to generate dynamic content. You write templates using <% %> scriptlet tags, <%= %> for output, and you can include other templates, pass data, and control flow with loops and conditionals. It’s fast because it compiles templates to JavaScript functions and caches them by default, so subsequent rendering is efficient. EJS supports both server-side render (in Node/Express) and client-side use in the browser, making it versatile for universal apps. Because you’re using raw JS, debugging is simple—the errors are standard JS stack traces with template line numbers included. While it doesn’t impose a rigid structure (you’re free to organize templates however you like), it works reliably and is simple to adopt. -
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Earth Enterprise
Google Earth Enterprise - Open Source
Earth Enterprise is the open source version of Google Earth Enterprise (GEE), a powerful geospatial application suite that enables organizations to build and host custom 3D globes and 2D maps using their own imagery and data. Unlike Google Maps or Google Earth, Earth Enterprise does not include Google’s proprietary imagery but instead provides the tools needed to manage and visualize private geospatial datasets. The system is composed of three main components: Fusion, which processes and integrates imagery, vector, and terrain data into unified map layers; Server, which hosts the resulting globes or maps via Apache or Tornado-based web servers; and Client, which includes the Google Earth Enterprise Client (EC) for 3D visualization and the Google Maps JavaScript API V3 for 2D viewing. Designed for enterprise, research, and government use, it allows for secure, scalable deployment of geospatial visualization systems within private infrastructure.