Remix IDE is a "no setup" browser and desktop application with GUI for developing Ethereum smart contracts. Open source and free.

Chainlink is a decentralized oracle project that provides real-world data to the blockchain in the most secure way. LINK is a digital asset token circulating in the network, and users use LINK to purchase services.

Hardhat is a development environment that helps developers test, compile, deploy and debug dApps on the Ethereum blockchain.

Truffle Suite is a Web3 development ecosystem consisting of three different tools: Truffle, Ganache, and Drizzle.

Embark is a popular blockchain development framework that allows you to easily develop and deploy decentralized applications (DApps).