Open Source JavaScript Software - Page 50
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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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Run Any Workload on Compute Engine VMsCompute Engine delivers high-performance virtual machines for web apps, databases, containers, and AI workloads. Choose from general-purpose, compute-optimized, or GPU/TPU-accelerated machine types—or build custom VMs to match your exact specs. With live migration and automatic failover, your workloads stay online. New customers get $300 in free credits.
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Saka Key
A keyboard interface to the web
Saka Key lets you control your browser with keyboard shortcuts. It is easy to use, highly configurable and will transform how you surf the web. Put away your mouse. When the web isn't accessible, it's because people who author content don't understand the benefit of making it accessible. Saka Key leverages accessibility information to make the browsing experience better for everyone. I hope this will encourage the creation of accessible content. Keyboard shortcuts are only the beginning of this journey. Screen reading and voice commands are on the roadmap. Map keyboard keys to browser tasks like scrolling, clicking links, switching, moving, closing, muting, and refreshing tabs, zooming, and navigating pages. Keyboard shortcuts are flexible, powerful, and easy to customize. Saka Key lets you easily switch between shortcut profiles (e.g. left hand, right hand, default, Vimium), and lets you import and export your settings. -
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Scalene
High-performance CPU, GPU, and memory profiler for Python
Scalene is a high-performance CPU, GPU and memory profiler for Python that does a number of things that other Python profilers do not and cannot do. It runs orders of magnitude faster than other profilers while delivering far more detailed information. Once Scalene has profiled your program, it will launch a web browser with an interactive user interface (all processing is done locally). Hover over bars to see breakdowns of CPU and memory consumption, and click on underlined column headers to sort the columns. Scalene is fast. It uses sampling instead of instrumentation or relying on Python's tracing facilities. Its overhead is typically no more than 10-20% (and often less). Scalene performs profiling at the line level and per function, pointing to the functions and the specific lines of code responsible for the execution time in your program. Scalene separates out the percentage of memory consumed by Python code vs. native code. -
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Schism
A self-hosting Scheme to WebAssembly compiler
Schism is an experimental compiler that translates Scheme programs into WebAssembly, allowing Scheme code to execute in both browser environments and server platforms like Node.js. Developed initially by Google researchers, the project was designed to explore the intersection of functional programming and WebAssembly’s low-level efficiency. Schism supports a subset of the R6RS Scheme standard and is self-hosting, meaning that the compiler itself is written in and compiled by Schism. Its architecture demonstrates advanced compiler design techniques such as staged compilation and snapshot-based bootstrapping. The project focuses on leveraging WebAssembly’s experimental capabilities, including reference types and tail calls, to test the limits of language portability and runtime performance. Though no longer actively maintained, Schism remains a valuable example of how high-level languages can be mapped to WebAssembly and offers insights into language implementation. -
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ScreenCat
Webrtc screensharing electron app for mac os (Alpha)
The ScreenCat project is an open-source screen sharing and remote collaboration application built on Electron and WebRTC that lets users share their desktop and grant control of mouse and keyboard to remote participants. Originally designed for developers and tech enthusiasts rather than commercial use, it emphasizes hackability and contribution from the community. The software uses experimental Chromium WebRTC APIs to stream desktop video to another peer, and it supports remote control through a browser interface by sending a simple invite code. Although still in alpha status, it provides a rare open collaborative alternative to proprietary screen sharing solutions. The architecture includes native dependencies for simulating input events, enabling real-time remote control across systems. Users can also screenshare between two ScreenCat applications or with a normal web browser, making it versatile for remote assistance and pairing scenarios. -
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Scroll Lock
Locks mouse wheel scroll inside container,
Scroll Lock is a jQuery plugin that fully addresses the issue of locking the mouse wheel scroll inside a given container, preventing it from propagating to the parent element. -
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Selectize
Hybrid of a textbox and <select> box for tagging and contact lists
Selectize is the hybrid of a textbox and <select> box. It's jQuery-based and it's useful for tagging, contact lists, country selectors, and so on. It clocks in at around ~7kb (gzipped). The goal is to provide a solid & usable user-experience with a clean and powerful API. It's a lot like Chosen, Select2, and Tags Input but with a few advantages. Developed by @brianreavis (partly at DIY). Licensed under the Apache License, Version 2.0… so do whatever you want with it! Skinnable. Comes with LESS stylesheets and shims for Bootstrap 2 and Bootstrap 3 (+ precompiled CSS). Interface & make addons like a boss with the plugin system. Fully documented on GitHub & inline. Want to search an item's title and description? No problem. You can even override the scoring function used for sorting if you want to get crazy. Order matters sometimes. Use the and arrow keys to move between items. -
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Semantic UI React
The Semantic-UI-React integration
jQuery is a DOM manipulation library. It reads from and writes to the DOM. React uses a virtual DOM (a JavaScript representation of the real DOM). React only writes patch updates to the DOM, but never reads from it. It is not feasible to keep real DOM manipulations in sync with React's virtual DOM. Because of this, all jQuery functionality has been re-implemented in React. Declarative APIs provide for robust features and prop validation. Control the rendered HTML tag, or render one component as another component. Extra props are passed to the component you are rendering as. Augmentation is powerful. You can compose component features and props without adding extra nested components. This is essential for working with MenuLinks and react-router. Shorthand props generate markup for you, making many use cases a breeze. All object props are spread on the child components. Components with repeating children accept arrays of plain objects. -
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Sequelize
A promise-based multi SQL dialect Node.js ORM
Sequelize is a promise-based Node.js ORM for Postgres, MySQL, MariaDB, SQLite and Microsoft SQL Server. It features solid transaction support, relations, eager and lazy loading, read replication and more. Sequelize follows SEMVER. Supports Node v6 and above to use ES6 features. Sequelize v5 was released on March 13, 2019. Official TypeScript typings are now included. Sequelize can be used since the beginning in order to automate the creation of every table in your database. Models are the essence of Sequelize. A model is an abstraction that represents a table in your database. In Sequelize, it is a class that extends Model. The model tells Sequelize several things about the entity it represents, such as the name of the table in the database and which columns it has (and their data types). -
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Serverless Offline
Emulate AWS λ and API Gateway locally
This Serverless plugin emulates AWS λ and API Gateway on your local machine to speed up your development cycles. To do so, it starts an HTTP server that handles the request's lifecycle like APIG does and invokes your handlers. Options passed on the command line override YAML options. List of available function names and their corresponding serverless.yml function keys are listed after the server starts. This is important if you use a custom naming scheme for your functions as serverless-offline will use your custom name. The left side is the function's key in your serverless.yml and the right side is the function name that is used to call the function externally such as aws-sdk. Once you run a function that boots up the Docker container, it'll look through the layers for that function, download them in order to your layers folder, and save a hash of your layers so it can be re-used in future. -
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Shipit
Universal automation and deployment tool
Install shipit command line tools and shipit-deploy in your project. Shipit is an automation engine and a deployment tool. Shipit provides a good alternative to Capistrano or other build tools. It is easy to deploy or to automate simple tasks on your remote servers. Shipit emits the init event once initialized, before any tasks are run. You can add custom event and listen to events. You can overwrite all default variables defined as part of the default object. If you can't call shipit.initConfig(...) right away because you need to get data asynchronously to do so, you can return a promise from the module. List of files excluded in copyFromRemote or copyToRemote methods. Allows you to ‘become’ another user, different from the user that logged into the machine (remote user). If shallowClone is set to false, this directory will be used to clone the repository before deploying it. -
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Shoestring
A lightweight, simple DOM utility made to run on a tight budget.
Shoestring is a lightweight, modular DOM framework intended for developers who need their code to download and run as fast as possible. It is intended to be "just enough" of a tool to efficently write maintainable cross-browser JavaScript. The API is modeled after jQuery but we intentionally implement a tiny subset of the API to cover only the methods we commonly need in our projects. Each feature is built as an optional extension to a minimal core so each can be removed from the production build (dependencies between extensions are rare). The selector engine delegates to modern browsers' native document.querySelectorAll (IE8) and addEventListener (IE9), which means it requires browsers that support those features. For projects that require deeper compatibility or a richer set of features, it is simple to swap in jQuery instead. As a rule, anything that works with Shoestring should work with jQuery, but not the converse. -
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Showdown
A bidirectional Markdown to HTML to Markdown converter in Javascript
A Markdown to HTML bidirectional converter written in Javascript! Showdown is a Javascript Markdown to HTML bidirectional converter, based on the original works by John Gruber. Showdown can be used client side (in the browser) or server side (with nodejs). See it working in the live demo! No hard dependencies or special installation instructions! Just download it (or use a CDN) and include it in your file. Out of the box, supports a number of popular markdown flavors like "vanilla", GFM or commonmark. Extra features like tables, metadata, etc., can be enabled through options. Showdown works both in server (nodejs) and client-side (browser). It's easily customizable and extendable, meaning you can add new syntax or modify it's behavior through extensions or options. Showdown is compatible with both new and old (such as IE8+ and nodejs 0.12). Written in EcmaScript5 means you can use it in your project as is, without the need of transpilers. -
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Simorgh
The BBC's Open Source Single Page Application
BBC World Service News websites are rendered using Simorgh, a ReactJS based Single Page Application which also builds Accelerated Mobile Pages (AMP) for every regular HTML page that it renders. Simorgh also renders AMP pages for BBC Public Service News and BBC Sport. Simorgh provides a fast and accessible web experience used by millions of people around the world each month (see list of websites using Simorgh). It is regularly maintained and well documented, and we welcome open-source contributors. Simorgh is primarily maintained by the BBC News Web Engineering teams. It delivers highly trusted news to readers all over the world, currently in (41 languages). We support a wide range of devices and care deeply about scale, performance, and accessibility. We work in agile, flexible teams, and have an exciting roadmap for future development. -
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SimpRead
An extension that allows you to instantly enter immersive reading
Unique function, by extracting titles, descriptions, text, media pictures/videos and other resources to generate pages that conform to Chinese reading habits, with zero-interference and immersive features, suitable for in-depth reading. Do not change the structure of the current page, just highlight the part that needs to be read, suitable for temporary reading or websites that are not adapted to the reading mode. Have pictures you don’t want to show? no problem! Any element on the page can be re-edited. The brand-new lexical analysis engine can not only recognize Wordpress, Hexo, Ghost, and Discuz, as long as it is a well-structured page, it can automatically generate a reading mode. Not only that, but also has a variety of recognition modes. -
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Site Kit for WordPress
Site Kit is a one-stop solution for WordPress users
Site Kit is a first-party WordPress plugin that brings key Google services into a single dashboard so site owners can see how their content performs and fix issues without leaving wp-admin. After a guided setup and verification flow, it connects properties to Search Console, Analytics, AdSense, PageSpeed Insights, and other services, surfacing the most relevant metrics per page and per site. The plugin focuses on clarity: traffic sources, search queries, top pages, and monetization signals appear alongside actionable performance recommendations. It also handles authentication and permission scopes securely, so multiple collaborators can access insights without sharing credentials. Widgets and contextual panels put data where it’s needed—for example, on the post list or edit screen—reducing tab-switching. For developers and agencies, Site Kit simplifies client onboarding and standardizes reporting across many sites. -
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Sketch Measure
Create spec for developers and teammates
Make it a fun to create spec for developers and teammates. Automatically generating html page with one click, inspect all the design details including CSS Styles on it offline. Layer's influence rect includes the area of shadows and outside borders, it's exactly the same size with the exported image. Sometime, shadows will not implement by engineers, it should be a part of image. Designer need to show the influence rect to engineers, not the regular rect. This is the feature using for. With Sketch Runner, just go to the install command and search for Sketch Measure. Runner allows you to manage plugins and do much more to speed up your workflow in Sketch. To create your own custom shortcuts, go to Keyboard in your System Preferences and click the Shortcuts tab. Select App Shortcuts and click ‘+’ to create a new shortcut. Choose Sketch from the Application list, then enter the exact name of the menu item you want to create the shortcut for. -
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SlimerJS
A scriptable browser like PhantomJS, based on Firefox
SlimerJS is a scriptable browser. It allows you to manipulate a web page with an external Javascript script: opening a webpage, clicking on links, modifying the content... It is useful to do functional tests, page automation, network monitoring, screen capture etc. It is a tool like PhantomJs, except that it runs Gecko instead of Webkit, and it is headless when using Firefox 56+. It can be used with Firefox 59. Higher version of Firefox is not supported and probably will not be supported in the future, as the development is suspended for now. SlimerJS provides the same API of PhantomJS. The current version of SlimerJS is highly compatible with PhantomJS 2.1. See current release notes in docs/release-notes-*.rst, and read the compatibility table to know the implementation level. The main goal of SlimerJS is to allow to execute all scripts developed for PhantomJS. So you could use tools like CasperJS. In fact, CasperJs 1.1 and higher can be executed with SlimerJS! -
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Soap
A SOAP client and server for node.js
A SOAP client and server for node.js. This module lets you connect to web services using SOAP. It also provides a server that allows you to run your own SOAP services. Very simple API Handles both RPC and Document schema types. Supports multiRef SOAP messages. Support for both synchronous and asynchronous method handlers. WS-Security UsernameToken Profile 1.0. Supports Express-based web server (body parser middleware can be used) The so called one-way (or asynchronous) calls occur when an operation is called with no output defined in WSDL. The server sends a response (defaults to status code 200 with no body) to the client disregarding the result of the operation. -
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Social Buttons for Bootstrap
Social Sign-In Buttons for Bootstrap
Social Sign-In Buttons made in pure CSS based on Bootstrap and Font Awesome! Include Bootstrap and Font Awesome. If you haven't done that already, include the latest Bootstrap and Font Awesome in your project. You have two options for enabling the social buttons in your project: vanilla CSS or source Less. For vanilla CSS, just include the bootstrap-social.css file into your project. Start using the buttons as you would normally do with the Bootstrap buttons that have an icon by adding the relevant class. -
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SockJS-client
WebSocket emulation and Javascript client
SockJS is a browser JavaScript library that provides a WebSocket-like object. SockJS gives you a coherent, cross-browser, Javascript API which creates a low latency, full duplex, cross-domain communication channel between the browser and the web server. Under the hood SockJS tries to use native WebSockets first. If that fails it can use a variety of browser-specific transport protocols and presents them through WebSocket-like abstractions. SockJS is intended to work for all modern browsers and in environments which don't support the WebSocket protocol, for example, behind restrictive corporate proxies. SockJS-client does require a server counterpart, such as SockJS-node, which is a SockJS server for Node.js. The API should follow HTML5 Websockets API as closely as possible. All the transports must support cross domain connections out of the box. It's possible and recommended to host a SockJS server on a different server than your main web site. -
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Space Desktop
This project was bootstrapped with Create React App
This project was bootstrapped with Create React App. If you aren’t satisfied with the build tool and configuration choices, you can eject at any time. This command will remove the single build dependency from your project. Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except eject will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own. You don’t have to ever use eject. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it. -
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Space Radar Electron
Disk And Memory Space Visualization App built with Electron & d3.js
Space Radar Electron is an application that offers an interactive and comprehensive visualization of disk space and memory usage of your computer. Built with Electron & d3.js, it currently offers visualizations in the form of Sunburst, Treemap and Flamegraph charts. As it scans the contents of your disk, it produces a preview visualization so you can already see what's been scanned. It allows for drilldown of directories, breadcrumbs and navigation. Space Radar works fast, and is cross-platform. Currently, there are many developments being planned for Space Radar, including more targets for scanning, coloring by file types, filtering hidden files and more. -
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Spearmint
An inclusive, accessibility-first GUI
Easily create, save, and run tests intuitively using Spearmint. Access your app's file directory and codebase while providing a fully functional in-app terminal and browser. When you're ready to continue developing your application, your Jest test files will be in your app's __tests__ folder. Writing tests is like eating your veggies: it's something everyone knows that they should do, but not everyone does. Spearmint provides a simple way to write tests that gives you confidence your application will work in the way your users interact with it. Spearmint provides a user-friendly GUI for developers to easily generate tests with a few clicks of a button. It dynamically converts user inputs into executable test code through react-testing-library, jest, supertest, puppeteer, vue-test-utils, solid-testing-library, and axe-core. Spearmint isn't just for React. Write tests for your Redux actions, async functions, reducers, or middleware. -
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Spritejs
A cross platform high-performance graphics system
Spritejs is a cross-platform high-performance graphics system, which can render graphics on web, node, desktop applications and mini-programs. SpritejsNext is the new version of spritejs. It is renderer agnostic enabling the same api to render in multiple contexts: webgl2, webgl, and canvas2d. Manipulate the sprites in canvas as you do with the DOM elements. SpritejsNext provides several kinds of basic sprite elements, which can be operated on the layer like DOM elements. Compatible for most modern browsers. You should import babel-polyfill for early browsers(i.e. iOS 8). -
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Standing Wave 3
Flash ActionScript3 dynamic audio library
Standing Wave 3 is an ActionScript 3 audio library that provides high-level control over the Flash Player’s SampleDataEvent API for streaming audio output. It builds on the foundation of Standing Wave 2 but has been extensively refactored, with its core sample storage and manipulation routines rewritten using Adobe Alchemy for significant performance improvements. Originally derived from the audio engine used in the Noteflight Score Editor, the library allows developers to combine and chain together audio sources, filters, and sequences to create dynamic, real-time sound experiences. Supported audio sources include MP3s, WAV files, and algorithmic generators, while filters enable effects such as echo, equalization, and envelope shaping. The system is flexible enough to handle complex timing sequences of audio, making it suitable for advanced audio applications or interactive projects.
