idk, my tool "vainstr" works pretty nice but isn't just a generator but a miner, lets you pick out some bech32 letter sequence that you want, beginning, end, or anywhere in the key, it can make a key like mine with "mleku" at the end in about 10 minutes on a 12 core ryzen 5. you can of course just get one instantly with just one chosen letter like 1 or something

nak from fiatjaf is a good tool for making events from the CLI, mattn's algia is a nice tool for publishing events too