@BitCoinReporter: [PSA] Don't store funds in Exchanges! Use Multisig wallets.
http://t.co/5WdLet3A2k #bitcoin
Any of these support it with some good level of privacy:
Armory Open Source, very secure and very complicated.
Coinkite Multiple key options (m-of-1/15) and lets you create the keys offline.
Greenaddress Only 2-of-2/3, 1 key must be created on the browser (italian tecnology)
Coinb.in Open Source, haven't tried yet. Suggested by /u/Aussiehash
Also consider hardware wallets (Trezor, HW1 and Ledger)