Open Source JavaScript Software - Page 80
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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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JSON Splora
GUI app for editing, visualizing, and manipulating JSON data
JSON-Splora is a GUI for editing, visualizing, and manipulating JSON data with jq or JavaScript. The editor is a JavaScript editor, and the input is parsed as json5. This allows for comments as well as a relaxed JSON input format. Once the editor has valid JSON, an input window will appear below, allowing you to manipulate the object with JavaScript or jq. A panel will appear to the right with the output, and updates live as the input or filter changes. -
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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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JSS
An authoring tool for CSS which uses JavaScript as a host language
A lib for generating Style Sheets with JavaScript. JSS is an authoring tool for CSS which allows you to use JavaScript to describe styles in a declarative, conflict-free and reusable way. It can compile in the browser, server-side or at build time in Node. JSS is framework agnostic. It consists of multiple packages, the core, plugins, framework integrations and others. If you’re interested in playing around with JSS, you can use an online code playground. Try a Hello World example on CodeSandbox. JSS generates actual CSS, not Inline Styles. It supports every existing CSS feature. CSS rules are created once and reused across the elements using its class name in contrary to Inline Styles. Also, when DOM elements get updated, previously created CSS rules are applied. JSS generates unique class names by default. It allows avoiding the typical CSS problem, where everything is global by default. It completely removes the need for naming conventions. -
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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 MD5
Compatible with server-side environments like node.js
JavaScript-MD5 is a small, dependency-free implementation of the MD5 hashing algorithm written entirely in JavaScript, designed to run consistently across browsers, Node.js, and popular module loaders. It allows you to generate MD5 hashes from strings, arrays, ArrayBuffers, and other binary-like data types, making it useful for checksums, fingerprinting, and simple integrity checks on the client or server. The library is exposed as a plain function, so usage is as simple as calling md5(value) and receiving the 32-character hexadecimal hash. It supports multiple packaging formats, including UMD, making it easy to drop into legacy codebases as well as modern bundlers like webpack or Browserify. A comprehensive test suite and demo page are provided to validate behavior across platforms and edge cases. -
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JavaScript localStorage
A simple, lightweight JavaScript API for handling browser localStorage
A simple, lightweight JavaScript API for handling browser local storage, it is easy to pick up and use has a reasonable footprint of 2.08kb(gzipped: 0.97kb), and has no dependencies. It should not interfere with any JavaScript libraries or frameworks. -
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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. -
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Jekyll LibDoc
A Jekyll documentation theme with built-in search and playground
A Jekyll documentation theme with built-in search and playground. LibDoc is a Jekyll theme that was crafted to easily and quickly get properly designed documentation, especially for CSS and Javascript libraries. It comes with a built-in playground and a local search engine. -
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Jesse
An advanced crypto trading bot written in Python
Jesse is an open-source AI agent framework designed to help developers build and orchestrate intelligent workflows that combine large language models (LLMs) with external tools, automation logic, and real-world actions. It acts as an agent manager where you can define tasks, contexts, and tool integrations so that AI reasoning is reliably connected to deterministic procedures like API calls, data retrieval, and task execution. Jesse emphasizes structured outputs, safety boundaries, and explainable reasoning, helping users design agents that don’t just hallucinate responses but can coordinate steps, validate conditions, and interact with systems predictably. It also includes built-in support for evaluation, logging, and orchestration so developers can monitor, test, and improve agent behavior over time. Because it’s framework-agnostic with respect to model providers, Jesse can work with different LLM backends, giving teams flexibility in cost and capability trade-offs. -
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Johnny-Five
JavaScript Robotics and IoT programming framework
Johnny-Five is the JavaScript Robotics & IoT Platform. Released by Bocoup in 2012, Johnny-Five is maintained by a community of passionate software developers and hardware engineers. Over 75 developers have made contributions towards building a robust, extensible and composable ecosystem. The only kit designed for getting started with Johnny-Five! The Johnny-Five Inventor's Kit, from Bocoup and SparkFun, is now available! It's designed for anyone who wants to get started with JavaScript-powered robotics. The J5IK includes a Tessel 2, and everything else you need to do 14 experiments! No programming or soldering experience is required. Microcontrollers and SoC platforms like to say "Hello World" with a simple blinking LED; the following demonstrates how to do this with the Johnny-Five framework. -
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Join Monster
A GraphQL to SQL query execution layer for query planning
A GraphQL to SQL query execution layer for query planning and batch data fetching. Efficient query planning and data fetching for SQL. Use JOINs and/or batched requests to retrieve all your data. It takes a GraphQL query and your schema and automatically generates the SQL. Send that SQL to your database and get back all the data needed to resolve with only one or a few round-trips to the database. Since it works with the reference implementation, the API is all very familiar. Join Monster is a tool built on top to add batch data fetching. You add some special properties along-side the schema definition that Join Monster knows to look for. The use of graphql-js does not change. You still define your types the same way. You can write resolve functions to manipulate the data from Join Monster, or incorporate data from elsewhere without breaking out of your "join-monsterized" schema. -
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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 Notebooks extensions
A collection of various notebook extensions for Jupyter
The jupyter_contrib_nbextensions package contains a collection of community-contributed unofficial extensions that add functionality to the Jupyter notebook. These extensions are mostly written in Javascript and will be loaded locally in your browser. For Jupyter version 4 or 5, use the master branch of the repository. Most nbextensions have been updated to work with both Jupyter 4.x and 5.x, but occasionally things get missed, or the Jupyter API changes in a minor version update, so if anything doesn't work as you'd expect/hope, please do check the issues, or open a new one as necessary! The Python package installation step is necessary to allow painless installation of the nbextensions together with additional items like nbconvert templates, pre-/postprocessors, and exporters. All of the nbextensions in this repo are provided as parts of a python package, which is installable in the usual manner. -
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Just JavaScript
the only javascript runtime to hit no.1 on techempower
The only javascript runtime to hit no.1 on techempower. -
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Kage
Kage is Graphical User Interface for Metasploit Meterpreter
Kage is Graphical User Interface for Metasploit Meterpreter and Session Handler. Kage (ka-geh) is a tool inspired by AhMyth designed for Metasploit RPC Server to interact with meterpreter sessions and generate payloads. Please follow the instructions to get a copy of Kage running on your local machine without any problems. electron-vue officially recommends the yarn package manager as it handles dependencies much better and can help reduce final build size with yarn clean. For now it only supports windows/meterpreter & android/meterpreter. -
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Kity Minder
Baidu brain map
KityMinder is another masterpiece of the f-cube group (formerly the UEditor group) of the Baidu FEX team. As an online brain map editing tool, it has an interactive experience no less than the native brain map tool. At the same time, it gives full play to the advantages of web cloud storage, and can directly synchronize the edited brain map to the cloud. In addition, with the original "cloud disk sharing" function, users can directly generate an online link from the currently edited brain map with one click and share it with other users to achieve seamless communication. KityMinder is implemented based on SVG technology and supports most major browsers. -
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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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Koa REST API Oops Serverless Boilerplate
Koa REST API Oops Serverless Boilerplate
Boilerplate for Node.js Koa RESTful API application with Serverless, Cors, Error Handling, Logger, Request Log Time. Koa REST API Boilerplate is a highly opinionated boilerplate template for building RESTful API application with Koa. -
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Koa Vue Fullstack Boilerplate
A lightweight boilerplate for a universal webapp based on koa
Vue.js, Koa.js, Node.js, and MongoDB full-stack lightweight example applications. Authentication, CRUD, and access control are included. This project aims to build a small but structured full-stack application, so it would be relatively clear for a programmer/beginner to understand how to build a website from scratch. -
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Koa-socket-2
Socket.IO for Koa
Koa-socket-2 uses socket.io v3. It is recommended that you connect to a koa-socket-2 server with a socket.io v3 client. Koa-socket-2 is only compatible with the Koa v2 style of middleware (where context is passed as a parameter). This project helps you start a SocketIO server using Koa and NodeJS. However, Google's Go language -- or GoLang -- allows you to write code that compiles down to binary. It can be a very good way to take your SocketIO server to the next level by running faster and requiring less overhead than runtime environments like NodeJS. -
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Kubernetes External Secrets
Integrate external secret management systems with Kubernetes
Kubernetes External Secrets allows you to use external secret management systems, like AWS Secrets Manager or HashiCorp Vault, to securely add secrets in Kubernetes. Read more about the design and motivation for Kubernetes External Secrets on the GoDaddy Engineering Blog. The community and maintainers of this project and related Kubernetes secret management projects use the #external-secrets channel on the Kubernetes slack for discussion and brainstorming. The project extends the Kubernetes API by adding an ExternalSecrets object using Custom Resource Definition and a controller to implement the behavior of the object itself. An ExternalSecret declares how to fetch the secret data, while the controller converts all ExternalSecrets to Secrets. The conversion is completely transparent to Pods that can access Secrets normally. By default Secrets are not encrypted at rest and are open to attack, either via the etcd server or via backups of etcd data. -
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Kubernetes Goat
Kubernetes Goat is a "Vulnerable by Design" cluster environment
Learn to attack or find security issues, misconfigurations, and real-world hacks within containers, Kubernetes, and cloud-native environments. Enumerate, exploit, and gain access to the workloads right from your browser. Understand how attackers think, work, and exploit security issues, and apply these learnings to detect and defend them. Also, learn best practices, defenses, and tools to mitigate, and detect in the real world. Learn the hacks, defenses, and tools. So that you can think like an attacker, and secure your Kubernetes, cloud, and container workloads right from the design, code, and architecture itself to prevent them. Use Kubernetes Goat to showcase the effectiveness of the tools, product, and solution. Also, educate the customers and share your product or tool knowledge in an interactive hands-on way. -
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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. -
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LLM React App Javascript Template
The Javascript template for an LLM react node app
This template is an example project for a simple Large Language Model (LLM) application built on top of React and Node. This template was built on top of the React template app from nano-react-app and updated with a Node server that uses HuggingFace.js and LangChain.js to connect to supported large language models. Use this template to easily build and run an LLM app. -
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LangServe
Helps developers deploy LangChain runnables and chains as a REST API
LangServe is an open-source deployment framework designed to expose LangChain applications as production-ready REST APIs. The tool simplifies the process of turning language-model pipelines, chains, and agents into web services that can be accessed by external applications. Instead of manually writing API endpoints, developers can use LangServe to automatically generate a server that exposes LangChain workflows through HTTP interfaces. The framework is built on top of FastAPI and uses Pydantic for request validation and structured data handling. It also includes client libraries that allow developers to interact with deployed chains from Python or JavaScript applications. LangServe is commonly used to deploy AI applications such as chatbots, document analysis pipelines, and agent-based systems that require scalable access through APIs.
