Free
Capacitor
Open SourceCross-Platform · Mobile Development
Run web apps natively on iOS, Android and the web.
hybridweb-viewsmobilejavascript
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Cross-Platform · Mobile Development
Run web apps natively on iOS, Android and the web.
Design Systems · Design & Prototyping
IBM's open-source design system for products and experiences.
Text & Diff · Developer Utilities
Create and share beautiful images of your source code.
Queues & Streaming · Database
The classic Python distributed task queue — async jobs, schedules and workflows on RabbitMQ or Redis.
UI Libraries · Frontend
Accessible, themeable React component system with style props.
Data Viz & Charts · Frontend
Simple, canvas-based charting for the web — eight chart types with sensible defaults and plugins.
AI Coding Assistants · AI for Developers
OpenAI's open-source coding agent for your terminal.
Hooks & Commits · Git & Version Control
Lint commit messages against Conventional Commits rules.
Web Scraping · Data & Analytics
TypeScript web scraping and browser-automation library from Apify — anti-blocking and queue management included.
Full-stack Boilerplates · Project Starters
Scaffold a typesafe full-stack Next.js app in seconds — tRPC, Prisma/Drizzle, NextAuth and Tailwind wired together.
CLI Tools · Development Environment
The classic command-line tool for transferring data with URLs.
Data Viz & Charts · Frontend
The foundational data visualization library — direct SVG/DOM manipulation for fully custom visuals.
UI Libraries · Frontend
Tailwind CSS component library with semantic class names.
Programming Languages
Official Dart language site with docs, packages and samples.
GUI Clients · Database
Open-source database manager for SQL and NoSQL with web and desktop apps.
Frameworks · Backend
Secure-by-default JavaScript/TypeScript runtime with built-in tooling.
References · Documentation & Learning
Fast, offline-capable API documentation browser combining 100+ references.
Cheatsheets · Documentation & Learning
Rico's cheatsheets: concise cheatsheets for dozens of tools and languages.
Offline Toolkits · Developer Utilities
The developer swiss-army knife for Windows and macOS — JSON formatting, base64, JWT, regex and 30+ tools, fully offline.
Illustrations & Assets · Design & Prototyping
Avatar generator with 30+ styles — deterministic avatars from any seed via library, API or playground.
Markdown · PDF & Documents
Online Markdown editor with live preview and cloud sync.
Frameworks · Backend
Batteries-included Python web framework with admin and ORM.
Documentation Generators · PDF & Documents
React-based static site generator optimized for documentation.
Self-Hosted PaaS · Cloud Platforms
Mini-Heroku powered by Docker: push-to-deploy on your own server.