It depends on what language you want to work to develop smart contracts. When you develop smart contracts using Solidity or Vyper, you need other language to test and develop. The most common languages used are JS/TS and Python. For JS/TS, Hardhat is still the most updated framework, with a big community and a lot of plugins to improve development.

The best frameworks to start developing smart contracts depend on the language you are comfortable with. For example, if you're working with Solidity, Truffle and Hardhat are great options. If you're working with Vyper, you can use the Vyper Compiler and the Brownie framework. For other languages, such as JavaScript, you can use the Ethers.js framework. Ultimately, the best framework for you will depend on your language of choice and the development environment you prefer.