LastPass – The last browser pass
Windows/Mac/Linux: Firefox extension and Internet Explorer add-on LastPass is a secure password manager for all your web passwords. Like other web-focused password managers, LastPass puts all of your individual passwords behind one master password. When you type in that master password, LastPass can then automatically log you in to any web site you visit with saved login credentials. Even better, LastPass syncs passwords over the internet, so all your saved passwords on your work computer, for example, will always be synced up on your home computer.