development
why-did-you-render monkey patches React to notify you about potentially avoidable re-renders. (Works with React Native as well.)
A Powerful API Mocking and Testing Tool
A full suite of tools to create and share API contracts, test APIs, mock them, and integrate them with web and mobile apps with ease.
Ruby Next makes modern Ruby code run in older versions and alternative implementations
Ruby Next is a transpiler and a collection of polyfills for supporting the latest and upcoming Ruby features (APIs and syntax) in older versions and alternative implementations. For example, you can use pattern matching and Kernel#then in Ruby 2.5 or mruby.
Welcome to JavaScript Rising Stars, your guide to the top trends and projects shaping the JS ecosystem.
Conférences sur la générative AI.
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A faster way to build and share data apps. Streamlit turns data scripts into shareable web apps in minutes. All in pure Python. No front‑end experience required.
Streamlit lets you transform Python scripts into interactive web apps in minutes, instead of weeks. Build dashboards, generate reports, or create chat apps. Once you’ve created an app, you can use our Community Cloud platform to deploy, manage, and share your app.
The Production-Ready Open Source AI Framework.
AI orchestration framework to build customizable, production-ready LLM applications. Connect components (models, vector DBs, file converters) to pipelines or agents that can interact with your data. With advanced retrieval methods, it's best suited for building RAG, question answering, semantic search or conversational agent chatbots.
Cursor for Designers.
The power of Cursor for your own React website. Onlook lets you visually edit your React website and write your changes back to code in real-time.
The open source Cursor for Designers. Design directly in your live React app and publish your changes to code.
The 1-file Micro-backend. Affordable Personal AI Smart Model Routing for Personal AI Agents. Cut Costs up to 70% 🦞👧🦚
Manifest is a smart model router for Personal AI Agents like OpenClaw or Hermes. It sits between your agent and your LLM providers, scores each request, and routes it to the cheapest model that can handle it. Simple questions go to fast, cheap models. Hard problems go to expensive ones. You save money without thinking about it.
First versions of the project:
80% of websites and apps only use the most basic backend features. Using over-engineered solutions lead to unnecessary costs and complexity.
Manifest keeps it simple, delivering only the essential backend features and smoothly integrating in your project like any other file in your codebase.
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Get Infrastructure from Code. Effortless backends with infrastructure from code. Nitric is a multi-language framework for cloud applications with infrastructure from code.
Nitric is a multi-language framework, with concise inline infrastructure from code. Modern applications should be robust, productive and a joy to build. Nitric solves common problems building for modern platforms:
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Integrate seamless commenting functionality into your Laravel project.
Commenter is a feature-rich, modern package with an admin panel designed to address all your commenting needs. With this package, you won't need any additional tools for the comment functionality in your Laravel projects.
FFMPEG Assembly Language Lessons.
Welcome to the FFmpeg School of Assembly Language. You have taken the first step on the most interesting, challenging, and rewarding journey in programming. These lessons will give you a grounding in the way assembly language is written in FFmpeg and open your eyes to what's actually going on in your computer..
Simple. Powerful. Unobtrusive. Build modern web applications with a framework that puts you first.
Aurelia is a modern, front-end JavaScript framework for building browser, mobile, and desktop applications. It focuses on aligning closely with web platform specifications, using convention over configuration, and having minimal framework intrusion. Basically, we want you to just write your code without the framework getting in your way. 😉
Aurelia applications are built by composing a series of simple components. By convention, components are made up of a vanilla JavaScript or Typescript class, with a corresponding HTML template.
This library intends to provide tools for storing and using monetary values in an easy, yet powerful way.
This is a PHP implementation of the Money pattern.
A very fast linker for Linux.
Wild is a linker with the goal of being very fast for iterative development.
The plan is to eventually make it incremental, however that isn't yet implemented. It is however already pretty fast even without incremental linking.
Simple, scalable state management.
MobX is a signal based, battle-tested library that makes state management simple and scalable by transparently applying functional reactive programming.
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A drop-in javascript spreadsheet library that provides rich features like Excel and Google Sheets.
The goal of FortuneSheet is to make a feature-rich, easy-to-configure online spreadsheet that you can use out-of-the-box.
This project is originated from Luckysheet and has inherited many code from it. Lots of efforts have done to translate the whole project to typescript (still in progress), and solved problems in the design of the original project.
Lab helps you experiment with code without friction. Type lab with any extension and start coding - it handles files, organization, and cleanup automatically.
Lab lets you experiment with code instantly—just type lab js (or any extension) and your editor opens, ready to go. No more overhead of creating files and folders. Your experiments are automatically organized with smart names (e.g., 250112a.js) in a lab folder, and they clean themselves up after 7 days to keep things tidy.
Microsoft Fluent UI Blazor components library. For use with ASP.NET Core Blazor applications.
The Fluent UI Blazor library provides a robust and extensive set of Blazor components. Some of those components are wrappers around Microsoft's official Fluent UI Web Components. Others are components that leverage the Fluent Design System or just make it easier to work with Fluent in general.
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Zero-Friction Serverless Apps On AWS Lambda & Beyond. Easy Serverless Apps on AWS Lambda.
Deploy APIs, scheduled tasks, workflows and event-driven apps to AWS Lambda easily with the Serverless Framework.
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An embedded scripting language for Rust.
Rhai is an embedded scripting language and evaluation engine for Rust that gives a safe and easy way to add scripting to any application.
Compile shell scripts to static binaries.
Bunster transforms your shell scripts into efficient, standalone binaries that are easy to distribute and deploy across platforms (only unix is supported at the moment).
Technically speaking, Bunster is a shell-to-Go Transpiler that generates Go source out of your scripts. Then, optionally uses the Go Toolchain to compile the code to an executable program.
Scan for React performance issues and eliminate slow renders in your app.
React Scan automatically detects performance issues in your React app.
Racket is a general-purpose programming language and an ecosystem for language-oriented programming.
Racket is a flexible, multi-paradigm language from the Lisp family, ideal for language-oriented programming. It supports functional, procedural, and object-oriented paradigms, and features a powerful macro system, robust modules, and extensive libraries. Racket is also widely used in education to teach programming concepts and language design.
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A tool for reverse engineering Android apk files.
Apktool is a tool for reverse engineering third-party, closed, binary, Android apps. It can decode resources to nearly original form and rebuild them after making some modifications; it makes it possible to debug smali code step-by-step. It also makes working with apps easier thanks to project-like file structure and automation of some repetitive tasks such as building apk, etc.
SRCL is an open-source React component and style repository that helps you build web applications, desktop applications, and static websites with terminal aesthetics. Its modular, easy-to-use components emphasize precise monospace character spacing and line heights, enabling you to quickly copy and paste implementations while maintaining a clean, efficient codebase.
Analyze your Ruby scripts with prism. Find Ruby syntax patterns with Prism.
The Evolution of Version Control. Version control that works the way you think.
Ever felt that version control should be simpler? That branching shouldn't require a PhD in Git? That merging shouldn't feel like defusing a bomb? We did too. That's why we built Evo.
Evo is a modern, offline-first version control system that focuses on what matters most: helping developers write great code together. No more merge conflicts that make you want to quit programming. No more branch structures that look like abstract art. Just clean, intuitive version control that works.
The most advanced responsive front-end framework in the world.
Foundation is the most advanced responsive front-end framework in the world. Quickly go from prototype to production, building sites or apps that work on any kind of device with Foundation. Includes a fully customizable, responsive grid, a large library of Sass mixins, commonly used JavaScript plugins, and full accessibility support.
Pack your codebase into AI-friendly formats.
📦 Repomix (formerly Repopack) is a powerful tool that packs your entire repository into a single, AI-friendly file. Perfect for when you need to feed your codebase to Large Language Models (LLMs) or other AI tools like Claude, ChatGPT, and Gemini.
Easily spot missing ARIA labels, misused ARIA roles, and incomplete keyboard support in your web applications.
Creating accessible web applications is difficult. It gets even harder if you don't understand how people with disabilities use computers.
With ARIA DevTools you see your website the way screen readers present it to the blind users. All page elements are presented according to their explicit or implied ARIA roles. This includes headings, images, tables and form items beyond others.
An extremely fast Python linter and code formatter, written in Rust.
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A goto styled text editor for SvelteKit; based on TipTap.
Tipex stands as an advanced rich text editor tailored for Svelte, meticulously engineered with the robust frameworks Tiptap and Prosemirror. It empowers developers to effortlessly craft rich text editors, liberating them from the intricacies of underlying technologies, style management, and related complexities.
pflag is a drop-in replacement for Go's flag package, implementing POSIX/GNU-style --flags.
pflag is compatible with the GNU extensions to the POSIX recommendations for command-line options. For a more precise description, see the "Command-line flag syntax" section below.
Go configuration with fangs.
Viper is a complete configuration solution for Go applications including 12-Factor apps. It is designed to work within an application, and can handle all types of configuration needs and formats.
A lightweight Java and Kotlin web framework.
Javalin is a very lightweight web framework for Kotlin and Java which supports WebSockets, HTTP2 and async requests. Javalin’s main goals are simplicity, a great developer experience, and first class interoperability between Kotlin and Java.
An open source Valkey client library that supports Valkey and Redis open source 6.2, 7.0 and 7.2. Valkey GLIDE is designed for reliability, optimized performance, and high-availability, for Valkey and Redis OSS based applications. GLIDE is a multi language client library, written in Rust with programming language bindings, such as Java and Python
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Modular building blocks for building collaborative applications like Google Docs and Figma.
Yjs is a shared editing framework. It exposes Shared Types that can be manipulated like any other data type. But they are synced automatically!
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Standards first web framework. Nue is HTML, CSS, and JavaScript taken to their absolute peak.
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Ultra-Lightweight Durable Execution in TypeScript. DBOS Transact: A Lightweight Durable Execution Library Built on Postgres.
Durable execution means persisting the execution state of your program while it runs, so if it is ever interrupted or crashes, it automatically resumes from where it left off. Durable execution helps solve many common problems:
This is a simple demonstration of more advanced, agentic patterns built on top of the Realtime API. - openai/openai-realtime-agents
🔥 Airbroke: Lightweight, Airbrake-compatible, PostgreSQL-based Open Source Error Catcher. Self-hosted, Cost-effective, Open Source Error Tracking for a Sustainable Startup Journey.
Email parser for browser and serverless environments.
postal-mime is an email parsing library that runs in browser environments (including Web Workers) and serverless functions (like Cloudflare Email Workers). It takes in a raw email message (RFC822 format) and outputs a structured object containing headers, recipients, attachments, and more.
Working with Django in the modern JavaScript ecosystem without giving up the things that make it great.
JavaScript is the lifeblood of the modern web application. You need it to do anything remotely complex on the web.
And these days, if you want a modern, responsive, interactive application—and who doesn't?—your front-end codebase may end up as large and complex as your back end.
A high-performance, zero-overhead, extensible Python compiler using LLVM.
Codon is a high-performance Python compiler that compiles Python code to native machine code without any runtime overhead. Typical speedups over Python are on the order of 100x or more, on a single thread. Codon supports native multithreading which can lead to speedups many times higher still.
Send your App Updates in Seconds 🚀.
Mirai is an open-source Server-Driven UI framework for Flutter to build cross platform applications.
Mirai is a powerful Server-Driven UI (SDUI) framework for Flutter, enabling you to build beautiful, cross-platform applications dynamically using JSON in real time.
GNU's programming and extension language.
Guile is designed to help programmers create flexible applications that can be extended by users or other programmers with plug-ins, modules, or scripts.
This is a package that shortens strings like Finder on Mac does. Instead of trimming from the start or end it trims the string in the middle and adds a filler char.
Hey there! In this book, we're going to build a small operating system from scratch, step by step.
You might get intimidated when you hear OS or kernel development, the basic functions of an OS (especially the kernel) are surprisingly simple. Even Linux, which is often cited as a huge open-source software, was only 8,413 lines in version 0.01. Today's Linux kernel is overwhelmingly large, but it started with a tiny codebase, just like your hobby project.
This package provides secure first factor one-time passwords (OTPs) for Laravel applications. Users enter their email and receive a one-time code to sign in.
Opensource, self-hosted AI coding assistant. Secure, flexible, and transparent AI coding.
Tabby is a self-hosted AI coding assistant, offering an open-source and on-premises alternative to GitHub Copilot.
Txtlog.net is an easy to use text log. Log anything from a web or mobile application by sending a POST request with the log data.
Swift is a powerful and intuitive programming language optimized when running on iOS, macOS, and other Apple platforms.
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📘 OpenAPI/Swagger-generated API Reference Documentation. Generate beautiful API documentation from OpenAPI.
Redoc is an open source tool for generating documentation from OpenAPI (formerly Swagger) definitions.
The Collaborative Programming Service by JetBrains.
Code With Me is a quick and efficient way for developers to help each other. Simply invite your colleagues, look into the problem together, and come up with a solution there and then. Code With Me is a new collaborative coding and pair programming service. It makes it possible for you to invite others into your IDE project, and work on it together in real time.
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Python3 library for downloading YouTube Videos.
pytubefix is a lightweight, Pythonic, dependency-free, library (and command-line utility) for downloading YouTube Videos.
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Cross-platform 2D and 3D game engine with modular architecture.
Thunder Engine is free for all purposes an open-source multi-functional lightweight game engine for creating 2D and 3D games. It provides a basic framework and extensible tools. So developers can focus on the creation, and the Thunder Engine will do the routine.
A CLI tool to convert your codebase into a single LLM prompt with source tree, prompt templating, and token counting.