1Password is designed to be the be-all, end-all of password apps. You have a master password, and the app can then create unique passwords for all your various online accounts, plus allows you to access them from any of your various devices.
A great suite of antivirus, security and backup programs built into one app. Lock, locate and protect your device with a wide array of features and options ranging from password protection to siren activation.
Free, with an option to upgrade to a premium package.
Protect your cloud services with Boxcryptor. This app allows you to put added protection on your sensitive materials that you have stored in the cloud. The app works with Dropbox, Google Drive, Skydrive, Sugarsynch and others.
This app provides password security, easy login to apps and websites, and a secure digital wallet. Your passwords and security information are encrypted and protected even if you lose your phone or device. Free.
Encrypt word files, music, pictures, pdfs or any number of other files with this app. You can either have the app automatically encrypt with a master password or you can manually encrypt chosen files with unique passwords.
Free version with ads. Ad-free version costs $1.49.
LastPass is a password manager that secures your passwords and personal information in an encrypted vault. As you visit apps and sites, LastPass autofills your login credentials. From your LastPass vault, you can store passwords and logins, create online shopping profiles, generate strong passwords, track personal information securely in notes, and more. All you have to do is remember your LastPass master password, and LastPass will autofill web browser and app logins for you.
With free data backup, a "find my device" option, continuous low-key virus scanning and more, Lookout has plenty of great features. One unique feature is an email that takes a picture of anybody who incorrectly enters a password three times.
Free, with a 'premium version' with more feature available.
Norton Security is well-known and well-respected for it's desktop protection. Now it is available for mobile devices as well with many of same dependable features. You can also create an account online and synch up protection for all your devices in one place.