Bip39gen https://www.spreaker.com/podcast/palerioiwk--6670096 While it employs BIP32 system you are able to continue to import BIP39 seeds into Electrum wallet. Also in addition to BIp32 there is BIP44 Model which some wallet use for that generation of seeds. Exactly how much safety does a passphrase add? A BIP39 passphrase drastically improves https://bip39marco.mystrikingly.com/