Free & open

Free Claude Developer Tools

Everything you need to build better Claude agents. Free tools, no signup.

Free tools

🔢

LLM Token Counter

Free

Count tokens and estimate API costs for Claude, GPT-4, and more.

Chrome extension: coming to CWS soon · Source on GitHub

📄

CLAUDE.md Generator

Free

Generate a CLAUDE.md file for your project in 30 seconds.

⚡

Claude Model Comparison

Free

Compare all Claude models by price, speed, and use case.

📝

Claude Prompt Library

Free

18 curated system prompts across developer, writing, data, support, and security roles. Filter, search, and copy instantly.

Paid resources

£9

Claude Agent Security Checklist

9-point security checklist for Claude agents. What actually breaks in production, with fixes.

£19

Multi-Agent Guide

Guide to running 10 Claude Code agents in parallel. How to coordinate them without it all falling apart.