Logo created for a Messaging app company a few years back. These guys were ahead of their time and unfortunately folded before they could really implement a client-base. The idea behind the logo was to incorporate a M for the name of the company, a chat bubble and a little flag that you see raised on mailboxes when you have mail.  The implication would alert you on any platform if you had received mail in one of your mailboxes. It was witty.