Curated open source apps, developer tools and self-hosted projects.
Solidity is a statically-typed, contract-oriented high-level programming language for writing smart contracts that run on the Ethereum Virtual Machine. This repository hosts the language and its compiler, with documentation, examples, and contribution guidance.
Mastering Ethereum: 2nd Edition is an open-source technical book by Andreas M. Antonopoulos, Gavin Wood and co-authors, covering Ethereum concepts and development. The repository hosts the book's content, available to buy or read online, under Creative Commons licensing.
A zero-knowledge interoperability layer for cross-chain messaging, asset transfers, NFTs, and DeFi, using consensus verification and IBC, with nodes, provers, relayers, and SDKs.
OpenZeppelin Contracts is a library for secure smart contract development, providing audited implementations of standards like ERC20 and ERC721, role-based access control, and reusable Solidity components.
Foundry is a Rust-based toolkit for Ethereum development, bundling Forge for building, testing and deploying Solidity contracts, Cast for chain interaction, Anvil for a local node, and Chisel as a Solidity REPL.
Quorum is a swarm of nine Solidity security lenses coordinated solely through Sibyl Memory, requiring two independent lenses to agree before a finding is confirmed. Confirmed patterns persist across sessions, and publishing a claim burns QUORUM tokens on Robinhood Chain.
Ctrl+ArcZ is an open-source USDC payment toolkit for Arc Testnet offering a pre-send risk firewall, code-gated reversible transfers, and on-chain spend policies. It ships as a web app, an npm SDK, and a native Android client, with no custody and no arbiter.
