Passwords have gotten so complicated that even people with ferociously sharp memories can struggle to recall the eccentric combinations of letters, numbers, and symbols. There are passwords for personal e-mail, work e-mail, bank accounts, Twitter, and Facebook, and woe to anybody who uses the same one for those two malware magnets. On top of that, it's recommended that you regularly change your passwords so they don't get compromised. Passwords are a pain, but LastPass slices through the Gordian knot of password management with a deft and effective cross-platform browser add-on/app/online password manager and form filler that makes web browsing easier and more secure. Although I prefer it on Chrome and iOS, LastPass is also available for Firefox, Internet Explorer, Opera, Safari, your descktop, and on Android.
The bottom line: Effective, secure, and easy to use, LastPass offers a broad base of password-management features for free that can be expanded when upgrading to the premium version. It's an essential add-on for modern Web browsing.