freeCodeCamp.org's open-source codebase and curriculum. Learn math, programming, and computer science for free.

A collective list of free APIs

Bitcoin Core integration/staging tree

A cryptocurrency trading API with more than 100 exchanges in JavaScript / TypeScript / Python / C# / PHP / Go

A list of semi to fully remote-friendly companies (jobs) in tech.

OpenZeppelin Contracts is a library for secure smart contract development.

Mastering Ethereum: 2nd Edition, by Andreas M. Antonopoulos, Gavin Wood, Carlo Parisi, Alessandro Mazza, Niccolò Pozzolini

Learn Blockchain, Solidity, and Full Stack Web3 Development with Javascript

Performant financial charts built with HTML5 canvas

A collection of awesome readme templates to display on your profile

Foundry is a blazing fast, portable and modular toolkit for Ethereum application development written in Rust.

A modular SQL linter and auto-formatter with support for multiple dialects and templated code.

🏗 forkable Ethereum dev stack focused on fast product iterations

⚡ Dynamically generated, customizable SVG that gives the appearance of typing and deleting text for use on your profile page, repositories, or website.

A JavaScript library for arbitrary-precision decimal and non-decimal arithmetic

Reproduce DeFi hacked incidents using Foundry.

A list of FREE resources to make Web3 accessible to everyone.

🎨 Enhance your GitHub profile with this amazing tool, which allows you to create a personalized README quickly and easily. This profile README generator is the best you'll find 🚀

Guidelines and training material to write secure smart contracts

A collection of smart contract vulnerabilities along with prevention methods

A practical example on how to perform sandwich attacks on Ethereum

Opinionated security and code quality standard for Solidity smart contracts.

Example arbitrage bot using Flashbots

The Compound On-Chain Protocol

An arbitrage bot between Uniswap AMMs

To learn common smart contract vulnerabilities using Foundry!

Central Repository for the Epoch 0 coursework and quizzes. Contains all the content, cross-referenced and linked.

Here we discuss how one can investigate crypto hacks and security incidents, and collect all the possible tools and manuals! PRs are welcome! If any tool is missing - please open PR!

🚀 Try the Learn EVM Explorer we just launched!!!