Suiet | Sui Wallet.

1. If you haven't installed the extension, follow these steps: what-is-suiet-sui-wallet-how-to-use-sui-wallet

2. Get some testnet tokens: https://suiet.app/docs/how-to-get-sui-tokens

3. How to upgrade extension: how-to-upgrade-extension

For developers

1. Suiet Developer page: Developer

2. Suiet wallet kit: one kit helps you connect all Sui wallets https://kit.suiet.app/docs/QuickStart
   
   

3. Suiet wallet adapter: https://github.com/suiet/wallet-adapter