Keeper strikes me as an example of a program where the mobile version was created first and the desktop edition was an afterthought. Usually it's the other way around, but with mobile apps being all the rage, I suspect we'll see a great deal more of this sort of thing.
Cost: Free; backup subscription, $9.99 per year. Platforms: Windows, Mac OS X, Linux, iOS, Android, BlackBerry, Windows Phone 7, Amazon Kindle Fire.
Keeper stores a limited range of information in each entry and doesn't have much in the way of systemwide integration.
LastPassSome of the other programs reviewed here suffer from weak browser integration, but that's an accusation you'll never be able to levy at LastPass. The program lives almost entirely within your browser, and it supports just about every browser out there: IE, Firefox, Chrome, Safari, and Opera.
When installed, LastPass places an icon in your browser's toolbar that, when clicked, opens the program's main menu in the browser window. In addition to passwords, LastPass can store secure notes (for instance, credit card and bank account information) and synchronize the contents of the vault with LastPass's servers whenever a network connection is available. You can even set up multiple user identities, so you can keep your own clutch of passwords safe from whomever else might be using your system.
As far as in-browser password management goes, LastPass works by replacing the native password management system in the browser you're using. When first installed, LastPass will attempt to copy any passwords stored in your browser to its own vault. And when you provide a username and password on a given Web page, LastPass will prompt you to save it, in much the same way Chrome and Firefox do. LastPass not only saves you the step of having to import anything by hand, it keeps you from having to modify the way you use passwords in the browser.
LastPass's clutch of tools includes a secure password generator and a "security challenge" that analyzes your passwords and makes suggestions for improvement. There's no systemwide hotkey to launch LastPass, but there is one to go directly to the program within the browser (Ctrl-Alt-H, by default; it's editable).