Smart Contracts GitHub Repositories (2026) · Open Source Tools

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

A curated list of awesome Web3 resources, libraries, tools and more.

Sui, a next-generation smart contract platform with high throughput, low latency, and an asset-oriented programming model powered by the Move programming language

⚓ Solana Program Framework

OpenZeppelin Contracts is a library for secure smart contract development.

LI.FI Smart Contracts

Solidity Compiler for Solana, Polkadot and Stellar

🦄 🦄 🦄 Peripheral smart contracts for interacting with Uniswap v3

Cryptographic javascript-functions for ethereum and tutorials to use them with web3js and solidity

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

A modern smart contract platform for Cardano

Official Go implementation of the IOST blockchain

Performant and Confidentiality-Preserving Smart Contracts + Blockchains

Write, test and deploy high-quality smart contracts to the Stacks blockchain and Bitcoin.

Uniswap Universal Router SDK - Decode and Encode Transactions - Uniswap V2, V3 & V4

Modular framework for creating selective indexers and featureful backends for dapps

Go implementation of Waves node, libraries and tools for Waves blockchain

A fully-fledged Hardhat project template based on TypeScript.

The official documentation for Stacks.

A corridor-integrity monitor for the Stellar network. Prices stablecoin→fiat-token corridors, scores routes against independent reference rates, and refuses to recommend when all options are unusable. Features wallet integration (Freighter/Albedo) and on-chain attestations via Soroban smart contracts.