MyEtherWallet to interact with the Ethereum blockchain
OpenZeppelin Contracts is a library for secure smart contracts
Ethereum JavaScript API
Synthetix Solidity smart contracts
Visualize Solidity control flow for smart contract security analysis
Grow Open Source
Censorship resistant democracies
(Formerly Solium) Code quality & Security Linter for Solidity
Squeezer framework, build serverless dApps