development
An open specification for enriching containers with development specific content and settings.
A Development Container (or Dev Container for short) allows you to use a container as a full-featured development environment. It can be used to run an application, to separate tools, libraries, or runtimes needed for working with a codebase, and to aid in continuous integration and testing. Dev containers can be run locally or remotely, in a private or public cloud.
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Build your Python web crawlers using Crawlee. It helps you build reliable Python web crawlers. Fast.
Crawlee—A web scraping and browser automation library for Python to build reliable crawlers. Extract data for AI, LLMs, RAG, or GPTs. Download HTML, PDF, JPG, PNG, and other files from websites. Works with BeautifulSoup, Playwright, and raw HTTP. Both headful and headless mode. With proxy rotation.
Syntax Highlighting React Server Component.
React Server Component for syntax highlighting.
Clojure/LLVM/C++.
jank is a general-purpose programming language which embraces the interactive, value-oriented nature of Clojure as well as the desire for native compilation and minimal runtimes. jank is strongly compatible with Clojure and considers itself a dialect of Clojure. Please note that jank is under heavy development; assume all features are planned or incomplete.
A curated catalogue of agentic AI patterns — real‑world tricks, workflows, and mini‑architectures that help autonomous or semi‑autonomous AI agents get useful work done in production.
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the JavaScript Database that Syncs! PouchDB is an open-source JavaScript database inspired by Apache CouchDB that is designed to run well within the browser.
PouchDB was created to help web developers build applications that work as well offline as they do online.
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The ProseMirror WYSIWYM editor. A toolkit for building rich-text editors on the web.
ProseMirror is a well-behaved rich semantic content editor based on contentEditable, with support for collaborative editing and custom document schemas.
Rich content editors should, ideally, produce clean, semantically meaningful documents while still being easy for users to understand. ProseMirror tries to bridge the gap between editing explicit, unambiguous content like Markdown or XML, and classical WYSIWYG editors.
The software engineering methodology developed by TigerBeetle to produce safer, faster software in less time
Themeable components for React & React Native. Bumbag is a themeable, accessible & composable component library for React & React Native allowing you to create cross-platform applications with ease.
Load testing designed for DevOps and CI/CD.
Gatling is a highly capable load testing tool. It is designed for ease of use, maintainability and high performance.
Out of the box, Gatling comes with excellent support of the HTTP protocol that makes it a tool of choice for load testing any HTTP server. As the core engine is actually protocol agnostic, it is perfectly possible to implement support for other protocols. For example, Gatling currently also ships JMS support.
A TUI (terminal UI) kit for Elixir.
Ratatouille is a declarative terminal UI kit for Elixir for building rich text-based terminal applications similar to how you write HTML.
La CNIL publie un guide RGPD pour les développeuses et développeurs
Afin de vous accompagner dans la mise en conformité de vos développements projet web ou applicatif, la CNIL a élaboré un guide de bonnes pratiques des développements en open source.
Swiss knife in pocket of every upgrade architect!
a mighty tiny command line interface.
Picocli aims to be the easiest way to create rich command line applications that can run on and off the JVM.
Picocli is a one-file framework for creating Java command line applications with almost zero code. It supports a variety of command line syntax styles including POSIX, GNU, MS-DOS and more. It generates highly customizable usage help messages that use ANSI colors and styles to contrast important elements and reduce the cognitive load on the user.
Standards first web framework. Nue is HTML, CSS, and JavaScript taken to their absolute peak.
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Chainlit is an open-source Python package to build production ready Conversational AI.
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PHP Operators is a reference guide for operators old and new in the PHP programming language.
AI Code Generator.
An open source Claude Artifacts – generate small apps with one prompt. Powered by Llama 3 405B & Together.ai.
snapDOM captures DOM nodes as images with exceptional speed avoiding bottlenecks and long tasks.
snapDOM is a high-fidelity DOM capture tool, developed as part of the animation engine I'm developing for Zumly — a framework for creating smooth zoom-based view transitions.
✨ Your best Front-End Tool ✨.
🗂 The Front-End Checklist Application is perfect for modern websites and meticulous developers!
The Front-End Checklist is an exhaustive list of all elements you need to have / to test before launching your website / HTML page to production.
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Turn real code (Github Gist) into faux code (SVG image).
A Git-compatible VCS that is both simple and powerful.
Jujutsu is a powerful version control system for software projects. You use it to get a copy of your code, track changes to the code, and finally publish those changes for others to see and use. It is designed from the ground up to be easy to use—whether you're new or experienced, working on brand new projects alone, or large scale software projects with large histories and teams.
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- Jujutsu for everyone.
- Steve's Jujutsu Tutorial.
- Tools Worth Changing To in 2025 @ Matthew Sanabria.
- Episode #77: Fallthrough & Friends @ Changelog & Friends.
- What I've learned from jj @ zerowidth positive lookahead.
- Git experts should try Jujutsu @ pksunkara.
- Jujutsu For Busy Devs @ Madeleine Mortensen.
- Jujutsu (jj) - quand Google réinvente Git en mode ninja @ Korben :fr:.
- Switch to Jujutsu already: a tutorial @ Stavros' Stuff.
- I see a future in jj @ Steve Klabnik.
- Reviewing large changes with Jujutsu @ Ben Gesoff.
- Jujutsu megamerges for fun and profit @ Isaac Corbrey.
- Git Is Not Fine @ Bill Jings.
- Reviewing large changes with Jujutsu @ Ben Gesoff.
- What comes after git @ East River Source Control.
âš¡A CLI tool for code structural search, lint and rewriting. Written in Rust. Find Code by Syntax. structural search/rewrite tool for many languages.
ast-grep(sg) is a fast and polyglot tool for code structural search, lint, rewriting at large scale.
Visual diff and merge tool.
Meld helps you compare files, directories, and version controlled projects. It provides two- and three-way comparison of both files and directories, and has support for many popular version control systems.
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roughViz.js is a reusable JavaScript library for creating sketchy/hand-drawn styled charts in the browser, based on D3v5, roughjs, and handy.
Alibaba unified front-end form solution
📱🚀 🧩 Cross Device & High Performance Normal Form/Dynamic(JSON Schema) Form/Form Builder -- Support React/React Native/Vue 2/Vue 3.
In React, the whole tree rendering performance problem of the form is very obvious in the controlled mode. Especially for the scene of data linkage, it is easy to cause the page to be stuck. To solve this problem, we have distributed the management of the state of each form field, which significantly improves the performance of the form operations. At the same time, we deeply integrate the JSON Schema protocol to help you solve the problem of back-end driven form rendering quickly.
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Amp is an agentic coding tool engineered to maximize what’s possible with today’s frontier models—autonomous reasoning, comprehensive code editing, and complex task execution.
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Use AI to transform your messy commit history into clean, logical commits that reviewers will love.
Git Smart Squash uses AI to automatically organize your changes into logical, well-structured commits in seconds.
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Framework reimagined for the edge!. Deliver instant apps at scale. Build instantly-interactive web apps without effort.
Qwik is a new kind of web framework that can deliver instant loading web applications at any size or complexity. Your sites and apps can boot with about 1kb of JS (regardless of application complexity), and achieve consistent performance at scale.
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Self-hosted snippet manager. Developed to collect and organize code snippets.
Snibox is a self-hosted snippet manager. Developed to collect and organize code snippets. Supports various programming languages, markdown, plain text.
Easy web apps for data science without the compromises. No web development skills required.
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Fluent OpenStack client for Java.
OpenStack4j is a fluent OpenStack client that allows provisioning and control of an OpenStack deployment. This includes support for Identity, Compute, Image, Network, Block Storage, Telemetry, Data Processing as well as many extensions (LBaaS, FWaaS, Quota-Sets, etc)
The Microsoft Graph software development kits (SDKs) are designed to simplify building high-quality, efficient, resilient applications that access Microsoft Graph. The SDKs include two components: a service library and a core library.
The service library contains models and request builders generated from Microsoft Graph metadata. The service library provides a rich, strongly-typed, and discoverable experience when working with the many datasets available in Microsoft Graph.
A small Python library created to help developers protect their applications from Server Side Request Forgery (SSRF) attacks. It implements an asynchronous GET method called safehttpx.get(), which is a wrapper around httpx.AsyncClient.get() while performing DNS validation on the supplied URL using Google DNS.
The Awesome Document Factory.
WeasyPrint is a smart solution helping web developers to create PDF documents. It’s free and open source software that can be easily plugged to your applications and websites and turns simple HTML pages into gorgeous:
WeasyPrint is a smart solution helping web developers to create PDF documents. It turns simple HTML pages into reports, invoices or tickets.
The Programming Language Repository.
Codigo is a site for discovering new and trending programming languages, finding and comparing languages, stay up-to-date on the latest news and changes, see code examples and more.
Codigo uses a combination of static data about languages that is maintained and open-contribution at GitHub, as well as dynamic data from user interactions and pulled from sources such as PyPL, TIOBE and blog feeds.
Make great React apps, ultra fast. Build exceptional React apps with blazing speed. Prismane is an innovative have-it-all React UI library
✅ ESLint plugin to enforce the JavaScript Baseline.
Default to the Web Platform Baseline, the cross‑browser compatibility standard. Ship code that works for everyone.
A carefully curated collection of high-quality React component libraries and design systems. Each library has been selected for its unique features, documentation quality, and community support.
the all-in-one repository lifecycle management tool. Checkpoint everything. Sync it back when you are ready.
A pair of CLIs with the same registry-aware, safety-first discipline — one to push, one to pull.
git-fire is one command to checkpoint many repositories: discover, auto-commit dirty work (optional), and push backup branches/remotes with safety rails.
You can use this tool to generate a valid Permissions Policy HTTP Header, which can be provided by your web server / web application in order to improve the security of your visitors and the data they may be accessing on your site.
A bot that integrates with GitHub and your favorite continuous integration service.
Homu listens to the pull request comments, waiting for an approval comment from one of the configured reviewers. When the pull request is approved, Homu tests it using your favorite continuous integration service, and only when it passes all the tests, it is merged into master.
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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.
Unified Backend Framework for APIs, Events and AI Agents.
Multi-language cloud functions runtime for API endpoints, background jobs, and agentic workflows using Motia Steps. Preview them in the Workbench, ship to zero-config infrastructure, and monitor in the Cloud.
The Open Source Discovery Service.
Libraries.io is a free service that collects publicly available open source package information scraped from the internet. With it you can search 9.96M packages by license, language, or explore new, trending, or popular packages.
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AI Code Retrieval with 95% Token Reduction.
Model-agnostic MCP server indexes your repo and hands any AI agent — Claude, GPT, Gemini — the exact function, class, or constant. No more 200K-token file dumps. More wins, fewer timeouts, lower bill.
Cut AI token costs 95%+ on code exploration. The leading MCP server for precise, symbol-level GitHub code retrieval via tree-sitter AST. Works with Claude Code, Cursor & any MCP client. 313B+ tokens saved.
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PHP Benchmarking framework.
PHPBench is a benchmark runner for PHP analogous to PHPUnit but for performance rather than correctness.
Automatically apply Tighten's default code style for Laravel apps.
Automatic configuration for Laravel apps to apply Tighten's standard linting & code standards.
Stop logging into a black hole. Give your logs a beautiful, powerful, and interactive home.
log-vwer is the ultimate plug-and-play toolkit for Node.js developers who are tired of messy console.log statements. It instantly gives you a professional-grade dashboard to view, search, and filter your application logs in real-time.
Gio is a library for writing cross-platform immediate mode GUI-s in Go. Gio supports all the major platforms: Linux, macOS, Windows, Android, iOS, FreeBSD, OpenBSD and WebAssembly.
The elegant TALLkit for Laravel artisans. Filament is a collection of tools for rapidly building beautiful TALL stack apps, designed for humans.
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.
AI-powered multi-agent builder. Let AI build multi-agent systems for you Build with Agents SDK. Connect MCP tools. Open-source.
An extremely fast Python package and project manager, written in Rust.
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- A year of uv: pros, cons, and should you migrate @ Bite code!.
- uv format: Code Formatting Comes to uv (experimentally!) @ Python Developer Tooling Handbook.
- Episode #660: Reinventing Python tooling with Rust @ Changelog Interviews.
- uv is the best thing to happen to the Python ecosystem in a decade @ Dr. Emily L. Hunt.
- Tame Python Chaos With uv – The Superpower Every AI Engineer Needs @ ShiftMag.
- How uv got so fast @ Andrew Nesbitt.
A set of several rich open source bundles based on Symfony
Worktrunk is a CLI for Git worktree management, designed for parallel AI agent workflows.
Worktrunk's three core commands make worktrees as easy as branches. Plus, Worktrunk has a bunch of quality-of-life features to simplify working with many parallel changes, including hooks to automate local workflows.
Reproducible Data Science Environments with Nix.
{rix} is an R package that leverages Nix, a package manager focused on reproducible builds. With Nix, you can create project-specific environments with a custom version of R, its packages, and all system dependencies (e.g., GDAL). Nix ensures full reproducibility, which is crucial for research and development projects.
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