Your own Ravencoin blockchain to configure however you choose. It’s recreated from scratch each time you restart GUI. It doesn’t connect to the real network and only consists of transactions and blocks which you create locally so it’s quick and responsive.
Create as many BIP44 accounts as you want on mainnet or testnet. See their address, WIF, XPub and XPriv.
Sign messages in legacy with any address in your GUI. Verify messages in legacy from any wallet.