Which altcoins have a lockbox/multi-sig?

[iluvbitcoins]

You can obviously use bitcoin to create a bitcoin lockbox needing at least 2 out of 3 signatures to take the coins out of it.
Which other altcoins support this function?
I tried googling it but found little information, figured it would be a lot easier to just ask.

[blue Snow]

I read ethereum has this function. they called Multisig Contracts. but for transaction function, ethereum only have one signature. source