LastPass

The Last Password You'll Have to Remember

Single Password
If you're like most people, you use the same two or three (or one) password for all your webite logins. Not good. LastPass is a service that lets you use an unlimited number of paswords and logins for different sites, but only have to remember one. Your passwords are transmitted and stored encrypted on their servers, allowing you to access them from anywhere.

Features:
Plugins for all major browsers: Chrome, IE, Firefox, Safari
Automatic Form Filling
Secure Note Storage
Site Organization including "Recently Used" & "Favorites"
Multiple Identities
High-Strength Password Generator

A feature that I found particularly helpful was the ability to import previously saved passwords from you browsers, eliminating the need to start from scratch.

https://lastpass.com/