Låter som om Clipperz skulle kunna vara något för dig.
"You can think of Clipperz as your web Rolodex, a card index where you can enter any sort of confidential data without worrying about security. It can be used to store and freely organize passwords, confidential notes, burglar alarm codes, credit and debit card details, PINs, software keys, …"
http://www.clipperz.com/
http://www.clipperz.com/learn_more