Starknet Tooling :: The Starknet Book

https://www.stark-utils.xyz/converter

Development tool-kits:

Scarb, the Cairo and StarkNet development toolchain

Cairo smart contract development toolchain Protostar | Protostar

https://github.com/0xSpaceShard/starknet-devnet

Starknet API Quickstart

Hello from Starknet.js | Starknet.js

StarkNet React - React Tools - Alchemy

Introduction - The Starknet Foundry Book