Blockstream Jade Bip39 Even though it takes advantage of BIP32 system you'll be able to still import BIP39 seeds into Electrum wallet. Also apart from BIp32 There is certainly BIP44 version which some wallet use for your generation of seeds. You can see the complete source code in standalone, offline https://privatebookmark.com/story18571774/bip85-vs-bip39-about-bip39