Bip39 format example https://bip39marco.mystrikingly.com/ Despite the fact that it utilizes BIP32 process you are able to still import BIP39 seeds into Electrum wallet. Also apart from BIp32 there is BIP44 version which some wallet use for that generation of seeds. As opposed to standard wallets derived only from the seed https://www.4shared.com/s/fAf7kF4dLku