OpenZeppelin Contracts is a library for secure smart contracts
CLS-based request id generation for Express, Fastify, Koa and Hapi
Super-lightweight, highly configurable, cross-browser date time picker
HTTP server mocking and expectations library for Node.js
JavaScript plugin for finding links in plain-text and converting them
The classless CSS reset (perfect for Communists)
List all available Node.js versions
Juice inlines CSS stylesheets into your HTML source
JavaScript library to integrate various web3 crypto wallets
Modern JavaScript utility library delivering modularity & performance
OpenPGP implementation for JavaScript
jquery tree plugin
A customizable life embetterment robot
Write email in Markdown and render them before sending
A powerful, interactive charting and visualization library for browser
A simple & straight-to-the-point PHP profiling extension
Cross-platform tool to kill processes
Embeddable and experimental Javascript engine written in Rust
Anti-AI-slop design skill for Claude Code, Cursor, and Codex
Makes coding agents get smarter with every task
AgentSkill with 24 themes, 31 layouts, 20+ animations
An open source, agentic Loom alternative
An arbitrary-precision Decimal type for JavaScript
World's first AI meeting copilot
Give ChatGPT long-term memory using the OP Stack