This Faucet sends small amounts of L2 Sepolia ETH/STRK to an account address on Starknet Sepolia. You can use it to pay transaction fee in Starknet.
Starknet Docs
The Starknet Docs is a step-by-step guide aimed at teaching you the essentials of Starknet Architecture and Development.
Cairo Book
Cairo is a language for creating STARK-provable programs for general computation. Cairo is the native smart contract language for Starknet, a permissionless decentralized Validity-Rollup.
Starklings App
Starklings is a web-based interactive tutorial to learn Cairo and Starknet.