Many, many thanks to Agile Web Solutions for sponsoring the RSS feed this week to promote their app, 1Password. I use 1Password just about every day I use my computer.
I would imagine that most here are familiar with it as being a password manager. It will save your login credentials for various websites and then log you in automatically next time. It will also generate strong passwords for you on the fly. Yet it is also a vault for all sorts of important info, such as bank accounts, license plate numbers, social security numbers, etc.
When on my Mac I mostly use 1Password to log me in or save new passwords and logins for the websites I visit. But on my iPhone and iPad it makes a fantastic tool for keeping any and all top-secret info available yet secure on my mobile device. It runs on the Mac, iPhone, iPad, and Windows and syncs over the air via Dropbox.