#ethereum

the blockchain for payments

Official consensus client of the Polygon blockchain.

Monorepo for MetaMask's account-related packages

This monorepo is a collection of packages used across multiple MetaMask clients

A Viem-based Toolkit for integrating embedded smart contract wallets into dapps.

OpenZeppelin Contracts written in Cairo for Starknet, a decentralized ZK Rollup

WalletConnect Monorepo

High-performance, well-tested & documented core libraries for Ethereum, in Rust

Solidity, the Smart Contract Programming Language

Source code verification service for Ethereum smart contracts

Rust implementation of the Ethereum Virtual Machine.

Ethereum smart contract fuzzer

DID resolver for Ethereum Addresses with support for key management

Libraries and utilities for interacting with canisters on the Internet Computer.

A collection of helpful contracts and libraries for use with Forge and Foundry

Official Go implementation of the Livepeer protocol

Blazingly fast, modular and contributor friendly Solidity compiler, written in Rust

Remix is a browser-based compiler and IDE that enables users to build Ethereum contracts with Solidity language and to debug transactions.

The Safe{Core} SDK allows builders to add account abstraction functionality into their apps.

SP1 is a zero‑knowledge virtual machine that proves the correct execution of programs compiled for the RISC-V architecture.

The design system for MetaMask products

Hyperledger FireFly is the first open source Supernode: a complete stack for enterprises to build and scale secure Web3 applications. The FireFly API for digital assets, data flows, and blockchain transactions makes it radically faster to build production-ready apps on popular chains and protocols.

Solhint is an open-source project to provide a linting utility for Solidity code.

JavaScript libraries for identity, auth, storage and transactions on the Stacks blockchain.

TypeScript SDK for self-custodial multi-chain wallets with MPC security, cross-chain swaps, and AI agent support. 40+ blockchains, no seed phrases.

Lightweight typescript library for cross-chain wallets. Connect with multiple blockchains via a common interface, with support for the minimum features necessary.