My favorite wallet lately. Easy to use, multi-signature. Open-sourced and created by the good folks at BitPay.
Why is this cool? It's easy to create a 2-of-3 wallet with keys stored separately on a mac, iPhone, and iPad. This wallet would require 2-of-3 devices to send payments. Copay supports other m-of-n combinations.
Handshake (HNS)