I am interested in using multisignature transactions to secure my company's coins and I'm wondering what tools are available right now for use with multisignature transactions? I'm especially interested in solutions that work on keys distributed between multiple wallets (no single wallet holds all the keys) and are not currency specific (would work just as well for Bitcoin as for Litecoin or other coins).

I know that the standard bitcoind API is lacking in multisignature support due to this bug.