Bip39 mnemonic code https://jsbin.com/titaniseko Although it uses BIP32 technique you'll be able to still import BIP39 seeds into Electrum wallet. Also besides BIp32 There is certainly BIP44 Edition which some wallet use for the generation of seeds. BitBox02 - A successor for the BitBox sequence, this hardware wallet supports BIP39 https://bookmarklinking.com/story9241895/bip39-alternative-a-secret-weapon-for-bip39-mnemonic-https-x-com-tundra838554