Bump
I don't think that there's currently an application out there which supports multisignature wallets for MULTIPLE crypto's in one interface.
What crypto's exactly do you want a multisig wallet for?
Anyway, for bitcoin i'd recommend to use
Electrum. Alternatively you could also maybe use something like armory/Bitcoin Core.
If you're also looking for regular multicrypto wallets, take a look here,https://www.cryptocompare.com/wallets, there might actually be some wallets that support multisig. ( Watch what you're downloading though!)