React and Next.js performance guidance for writing, reviewing, and refactoring production UI code.

Cognee is the open-source AI memory platform for agents. Give your AI agents persistent long-term memory across sessions with a self-hosted knowledge graph engine.

Secure, Fast, and Extensible Sandbox runtime for AI agents.

Turn any technical book PDF into a Claude Code skill — ready to study, reference, and use while you work.

A Web3 wallet and agent platform for the Unicity network - dual-layer crypto wallet, DMs, group chat, and marketplace.

28 eval-informed mental models and critical-thinking skills for Claude Code, GitHub Copilot, Codex, Cursor, and other Agent Skills-compatible tools

Visualizer for pandas data structures

Task management for the Obsidian knowledge base.

Logical Replication extension for PostgreSQL 17, 16, 15, 14, 13, 12, 11, 10, 9.6, 9.5, 9.4 (Postgres), providing much faster replication than Slony, Bucardo or Londiste, as well as cross-version upgrades.

Android open source calendar

ArcticDB is a high performance, serverless DataFrame database built for the Python Data Science ecosystem.

This is the official DTCG repository for the design tokens site and specification.