Open Source JavaScript Software - Page 85
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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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Search with Lepton
Lightweight demo to build a conversational AI search engine quickly
Search with Lepton is an open source demonstration project that shows how to build a conversational search engine using the Lepton AI framework. It combines traditional web search with large language models to provide natural language answers to user queries. It retrieves information from supported search engines and uses that context to generate responses through a retrieval-augmented generation approach. The implementation is intentionally minimal, containing fewer than 500 lines of code while still providing a complete working example of an AI-powered search system. It includes both a backend service written in Python and a web interface that allows users to interact with the search engine in a conversational format. Developers can configure different search providers and language models through environment variables, making it flexible for experimentation and prototyping. -
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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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Semiotic
A data visualization framework combining React & D3
Semiotic is a data visualization framework combining React & D3. It provides three types of frames XYFrame, OrdinalFrame, NetworkFrame, to deploy a wide variety of charts. XY data i.e. line charts and scatterplots. Categorical data i.e. bar charts, violin plots, parallel coordinates. Topological and network data i.e. flow diagrams, network visualization, and hierarchical views. A guide for creating a line chart, timeseries, difference line, and line percents using XYFrame along with hover behavior, responsive dimensions, and styling. XYFrame takes lines as an object or an array of objects. Each object represents a line. Every object needs a coordinates property with the array of points for that line. The points will be rendered in the order of that array. You can use a key other than coordinates by changing the lineDataAccessor props. -
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SendGrid Node.js Library
The Official Twilio SendGrid Led, Community Driven Node.js API Library
The SendGrid Node.js Library provides a simple interface for sending emails through SendGrid's API, enabling developers to integrate email functionalities into Node.js applications. -
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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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Shoutem UI
Customizable set of components for React Native applications
Shoutem UI is a set of styleable components that enables you to build beautiful React Native applications for iOS and Android. All of our components are built to be both composable and customizable. Each component has a predefined style that is compatible with the rest of the Shoutem UI, which makes it possible to build complex components that look great without the need to manually define complex styles. You can also use standard React Native components in your layouts anywhere you want, but they will not inherit either the theme or the parent styles, so you will need to style them manually. Shoutem UI is a part of the Shoutem UI Toolkit that enables you to build professional-looking React Native apps with ease. -
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Simple Line Icons
Simple and Minimal Line Icons
Simple line icons with CSS, SASS, LESS & Web-fonts files. You can find a cheat sheet of the complete set of icons at Simple Line Icons - GitHub Pages. Alternatively, you can also clone or download this repository as zip. If you are a designer, you can use this creative cloud library in your project. Jamal Jama for creating this awesome webfont & Ahmad Firoz for extending it further. -
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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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Size Limit
Calculate the real cost to run your JS app or lib
Size Limit is a JavaScript performance budget tool that measures the real cost of your JavaScript bundle and prevents regressions by enforcing limits in CI. It calculates not just raw bundle size, but also download and execution time under configurable network conditions, giving a more realistic sense of what users experience. The tool is modular: it offers a CLI and multiple plugins (file, webpack, time) plus presets tailored to different use cases, from big single-page apps to small npm libraries. When integrated with GitHub Actions, CircleCI, or other CI systems, it runs on every commit or pull request, failing the pipeline if a change exceeds the configured budget. It can also annotate pull requests with comments that highlight how the bundle changed, making performance regressions visible to reviewers early. With the --why flag, size-limit can analyze what contributes most to bundle size and show a dependency breakdown (using Statoscope). -
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Smaug
Archive your Twitter/X bookmarks to markdown
Smaug is a developer tool for archiving Twitter (X) bookmarks — and optionally likes — into markdown files in an automated way, offering a simple means of preserving social media content in human-readable, version-controlled text. Named after the treasure-hoarding dragon, it uses the Twitter API (or community tools like the bird CLI) to fetch bookmarked posts and outputs them in markdown, making it easy to back up content for future reference or documentation. Smaug is designed for automation and integration into personal workflows, allowing users to run setup and export jobs from the command line with minimal configuration. It supports configuration through JSON and can be extended or scripted as part of broader personal knowledge management systems. Because the output is plain markdown, it fits well with static site generators and digital gardens — preserving links, text, and metadata in a format that’s both platform-independent and version-friendly. -
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Smoothie Charts
Smooth JavaScript charts for realtime streaming data
Smoothie Charts is a small JavaScript charting library built for real-time streaming data. It focuses on smooth live updates instead of charts that visibly jump every time new data arrives. Developers can create a TimeSeries object, attach it to a SmoothieChart, and stream the chart into an HTML canvas element. Data points can be appended continuously, making it useful for dashboards, monitoring tools, server metrics, sensors, and other live feeds. The project includes examples, documentation, an interactive builder, and installation options through npm, Yarn, Bower, or direct JavaScript usage. Overall, it is a lightweight option for adding fluid, browser-based streaming charts. -
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Sockette
The cutest little WebSocket wrapper
Sockette is a tiny (367 bytes) wrapper around WebSocket that will automatically reconnect if the connection is lost. In addition to attaching additional API methods, Sockette allows you to reuse instances, avoiding the need to redeclare all event listeners. You have direct access to the (current) underlying WebSocket within every EventListener callback. -
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Speed-Test
Test your internet connection speed and ping using speedtest.net
Speed-Test is a command-line tool that allows users to measure their internet connection speed directly from the terminal, providing a quick and convenient way to assess download and upload speeds. -
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StatiCrypt
Password protect a static HTML page
StatiCrypt uses AES-256 and WebCrypto to encrypt your HTML file with your long password and return a static page including a password prompt and the javascript decryption logic that you can safely upload anywhere (see what the page looks like). This means you can password protect the content of your public static HTML file, without any back-end - serving it over Netlify, GitHub pages, etc. You can encrypt a file online in your browser (client side). StatiCrypt uses WebCrypto to generate a static, password protected page that can be decrypted in-browser. You can then just send or upload the generated page to a place serving static content (github pages, for example) and you're done: the page will prompt users for a password, and the javascript will decrypt and load your HTML, all done in the browser. -
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Status Desktop
Status Desktop client made in Nim & QML
Status Desktop is a client application developed in Nim and QML, providing a secure and private communication platform that integrates messaging, cryptocurrency wallet, and Web3 browser functionalities. -
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Svelte
Cybernetically enhanced web apps
Svelte is a new way to build web applications. It's a compiler that takes your declarative components and converts them into efficient JavaScript that surgically updates the DOM. Svelte shifts as much work as possible out of the browser and into your build step. No more manual optimizations, just faster, more efficient apps. Write breathtakingly concise components using languages you already know, HTML, CSS, and JavaScript. Oh, and your application bundles will be tiny as well. Built-in scoped styling, state management, motion primitives, form bindings and more — don't waste time trawling npm for the bare essentials. It's all here. -
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Swagger Injector
Delivering swagger docs through Node middleware
Adaptation of swagger UI to render the swagger view of a server's swagger documentation for a specified route. -
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SyntaxHighlighter
Self-contained code syntax highlighter developed in JavaScript
SyntaxHighlighter is THE client side highlighter for the web and web-apps! It's been around since 2004 and it's used virtually everywhere to seamlessly highlight code for presentation purposes. The history of this project predates majority of the common web technologies and it has been a challenge to dedicate time and effort to keep it up to date. Everything used to be in one file and assign window variables. SyntaxHighlighter is currently used and has been used in the past by Microsoft, Apache, Mozilla, Yahoo, Wordpress, Bug Labs, Freshbooks and many other companies and blogs. As it always goes with open source, you are welcome to use SyntaxHighlighter free of charge. -
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System Prompts Leaks
Collection of extracted System Prompts from popular chatbots
System Prompts Leaks is a curated repository that collects known leaked or publicly exposed system prompts used by large language models, organized so researchers, developers, and AI safety advocates can analyze them in one place. The project highlights how system prompts — instructions that strongly influence model behavior — have been inadvertently shared in forums, datasets, and open repositories, illustrating common patterns and potential vulnerabilities in prompt design and deployment. By aggregating these prompts, the repository serves as a valuable resource for understanding how widely different models are being guided in the wild, which helps with comparative analysis across architectures and service providers. It also helps raise awareness around prompt security, showing how exposed system instructions can lead to unintended behaviors or exploitation if not properly protected. -
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TACHYONS
Functional CSS for humans
Create fast loading, highly readable, and 100% responsive interfaces with as little CSS as possible. Everything should be 100% responsive. Everything should be readable on any device. Everything should be as fast as possible. Designing in the browser should be easy. It should be easy to change any interface or part of an interface without breaking any existing interfaces. Doing one thing extremely well promotes reusability and reduces repetition. Documentation helps promote reusability and shared knowledge. CSS shouldn't impede accessibility or the default functionality of HTML. You should send the smallest possible amount of code to the user. Usable across projects. Growing open source component library. Works well with plain HTML, React, Ember, Angular, Rails and more. Infinitely nestable responsive grid system. Built with PostCSS. Optimized for maximum gzip compression. -
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Taiko
A node.js library for testing modern web applications
Taiko is an open-source Node.js library designed to automate modern web browsers and simplify the process of end-to-end testing for web applications. It provides a concise JavaScript API that allows developers to control browsers programmatically and create automated test scripts that simulate real user interactions with websites. The tool was developed by the team behind the Gauge testing framework and focuses on reliability and readability in browser automation workflows. Taiko works with Chromium-based browsers such as Chrome, Microsoft Edge, and Opera, and can also interact with Firefox, enabling developers to test modern web interfaces across multiple environments. The library includes intelligent element selection capabilities that automatically locate elements on the page, reducing the need for fragile CSS selectors or XPath expressions. -
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Taskr
A fast, concurrency-focused task automation tool.
Taskr is a fast, concurrency-focused task automation tool for Node.js, designed to handle build processes and workflows efficiently. -
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TavernAI
Atmospheric adventure chat for AI language models
TavernAI is an open-source front-end interface designed for interacting with large language models in a conversational and roleplay-oriented environment, offering users a highly customizable and immersive chat experience. It allows users to connect to various AI backends, including local and cloud-based models, enabling flexibility in how conversations are generated and managed. The platform supports advanced character creation, allowing users to define personalities, memory, and behavior patterns that influence how the AI responds during interactions. TavernAI includes features such as persistent chat histories, branching conversations, and contextual memory, making it suitable for long-form storytelling, roleplaying, and creative writing. It also provides a rich interface with support for extensions and plugins, enabling users to expand functionality and tailor the experience to specific use cases. -
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TenorSpace.js
Neural network 3D visualization framework
TensorSpace is a neural network 3D visualization framework built using TensorFlow.js, Three.js and Tween.js. TensorSpace provides Keras-like APIs to build deep learning layers, load pre-trained models, and generate a 3D visualization in the browser. From TensorSpace, it is intuitive to learn what the model structure is, how the model is trained and how the model predicts the results based on the intermediate information. After preprocessing the model, TensorSpace supports the visualization of pre-trained models from TensorFlow, Keras and TensorFlow.js. TensorSpace is a neural network 3D visualization framework designed for not only showing the basic model structure but also presenting the processes of internal feature abstractions, intermediate data manipulations and final inference generations. By applying TensorSpace API, it is more intuitive to visualize and understand any pre-trained models built by TensorFlow, Keras, TensorFlow.js, etc. -
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Text2Video
Software tool that converts text to video for more engaging experience
Text2Video is a software tool that converts text to video for more engaging learning experience. I started this project because during this semester, I have been given many reading assignments and I felt frustration in reading long text. For me, it was very time and energy-consuming to learn something through reading. So I imagined, "What if there was a tool that turns text into something more engaging such as a video, wouldn't it improve my learning experience?" I created a prototype web application that takes text as an input and generates a video as an output. I plan to further work on the project targeting young college students who are aged between 18 to 23 because they tend to prefer learning through videos over books based on the survey I found. The technologies I used for the project are HTML, CSS, Javascript, Node.js, CCapture.js, ffmpegserver.js, Amazon Polly, Python, Flask, gevent, spaCy, and Pixabay API.
